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Comcast allows customers to rent the xFi gateway for a $14 monthly equipment rental. Most of them end up opting for it, but in reality, purchasing your own modem that’s compatible with Xfinity is better than renting.

But how do you know which one to get? Should you get a modem/router combo or choose a modem + separate router setup?

Don’t stress out, not finding answers to these questions is why a lot of people end up using mediocre hardware and paying hefty equipment rental. The good thing is, being a networking hardware enthusiast, I’ve done all the research for you.

Below, I’ve ranked and reviewed, the 9 best modems (including combos) for different Xfinity internet plans and use cases such as gaming, streaming, etc.

1. Best Overall: Motorola MB8611

If you’re subscribed to Xfinity’s fastest internet plan i.e., Gigabit Extra (1200 Mbps), then the MB8611 is the perfect modem to get. I tested its limits by simultaneously streaming & online gaming for 5-6 hours. Trust me, I noticed no lags, slowdowns, overheating, ranking #1.

Motorola MB8611
  • Technology: DOCSIS 3.1
  • Downstream/Upstream: 32 x 8
  • Ports: 1 x 2.5G Ethernet
  • Suitable Service Plan: Gigabit Extra (1.2 Gbps)
  • Modem-Router Combo: No

It’s a successor to the old MB8600 (which itself was a top-notch device during its time). Compared to the predecessor, it is much better in terms of DOCSIS tech, ethernet port, and others for overall excellent performance.

It’s a stand-alone device, so, you would need a separate router. Since it’s a multi-gigabit modem, pairing it with an underpowered routing unit won’t make sense. I’d suggest getting a high-speed WiFi 6 or 6E router.

This is what users have to say about MB8611:

This modem was so easy to set up!  The instruction manual was clear and precise. I am not the most tech-savvy person and yet the installation was like a piece of cake. It was just plug, update, and play.

William B.

It might be a little pricey but it is so worth it. I have had one of the best gaming experiences with this modem. Plus, it frees me from the burden of equipment rental. The only thing you need to keep in mind is pairing a reliable router with it.

Terry C. Harmon

I am subscribed to Xfinity’s Gigabit Extra Plan and recently got Motorola MB8611. I have started making complete use of my high-speed plan. This is the best investment I have ever made in my internet setup.

Victoria J. Selman

I was planning to upgrade my modem and router for my game streaming gig. On Kurt’s recommendation and my own research, I chose Motorola MB8611 as I already had a TP-Link Archer GX90 router. This is a great combination.

Terrence J.

Why is it a suitable choice?

Best Modem for Xfinity: Motorola MB8611

Motorola claims that the MB8611 can handle multi-gigabit connections up to 2,500 Mbps. That’s why in my opinion, it makes more sense to use it with Xfinity’s Gigabit Extra (1200 Mbps) plan.

During my tests, I paired it with the Archer AX90 (tri-band WiFi 6 router) that’s capable of handling speeds up to 6600 Mbps.

Based on several speed tests, I could witness a download speed of 1172 Mbps and an upload speed of 189 Mbps. This is a holy grail for gamers and streamers! In the case of basic activities like surfing and video conferencing, the DOCSIS 3.0 fallback is also supported, with 32 x 8 channel bonding technology on offer.

Motorola MB8611 Speed Test

Adding to the speed is DOCSIS 3.1’s AQM functionality for better traffic prioritization. What it does is mark or drop data packets before the queue is full to maintain or drop probabilities and thereby minimize latency.

If your router comes with QOS, it adds a cherry on top, but even without that, I could play Destiny 2, Red Dead Redemption, and others at 95 FPS. The performance remains smooth, even if you’re streaming videos, attending video calls, or active on other tasks simultaneously.

Hardware & Other Features

The MB8611 packs something really powerful inside, as evident from the performance output it generates. Although the manufacturer doesn’t reveal much, there is a power-efficient Broadcom processor and 512 MB RAM to keep latency in check. Further, there’s 128 MB of flash memory to store the key firmware insights.

This hardware configuration ensures faster internet and better movement of data packets. The chipset provides better speeds even during peak hours, whereas the network congestion is taken care of by DOCSIS 3.1.

The device displays theoretical capabilities of up to 3.8 Gbps, but the same is only possible if the ISP launches plans to match up to the DOCSIS 3.1 standard.

Design & Connectivity

Aesthetically, this Motorola modem is pretty standard and assumes a rectangular and plastic-clad form factor. It measures 7.88 x 7.25 x 2.25 inches and weighs 1.15 inches to stay a bit wider and less bulky options. Four indicator lights in the front panel display the status of the device. 

Besides, in the rear panel, find a multi-gig ethernet port with 2.5 Gbps of maximum speed capacity. It, with a relevant plan, can transmit data packets at the rate of 1.94 Gbps for downloads and 315 Mbps for uploads. Plugging my gaming console reduces ping value and makes it a worthy choice for gamers.


Overall, Motorola MB8611 is the best choice for an Xfinity Gigabit Extra (1200 Mbps) connection. It doesn’t compromise in any aspect. Its support for AQM and 2.5 Gbps internet speed paves the way for lag-free gaming and seamless streaming.

But a single port and lack of Link Aggregation are some of its letdowns. For more details, you can also read my detailed review.


    • DOCSIS 3.1 standard
    • 2.5 Gig ethernet port
    • Link Aggregation support
    • Active Queue Management
    • Built-in surge protection


    • Only one Ethernet port
    • A tad costly

2. Best Runner-Up: ARRIS SURFboard S33

If you somehow do not like the MB8611 and want an alternative that performs similarly, then go for ARRIS S33. Be it gaming, streaming, or bandwidth-hungry smart home devices, it won’t let you down.

Arris Surfboard S33
  • Technology: DOCSIS 3.1
  • Downstream/Upstream: 32 x 8
  • Ports: 1 x 2.5G + 1 x Gig Ethernet
  • Suitable Service Plan: Gigabit Extra (1.2 Gbps)
  • Modem-Router: No

This is what users have to say about S33:

I wanted to upgrade my DOCSIS 3.0 modem to DOCSIS 3.1. Since I had used an ARRIS unit in the past, it was easy to trust it again. I was able to set it up using the mobile app. It was easy to stream, game, and perform various tasks simultaneously using S33.

Sarah T.

No overheating! I use my devices for a long time at a very high capacity which usually made my previous modem heat up. This used to break speeds. However, I faced no such Issue with my new S33 modem, which just makes it perfect for my kinda people.

Ronald B.

I thought it was a bit expensive for an internet modem. At the same time, I wanted to eliminate rentals. I went ahead and the device will pay for itself in about 2-2.5 years. To be honest the seamless experience that I’m currently having is making it all worth it. Thanks to you.

Sandra R.

I have a 1Gbps Xfinity plan and recently upgraded to Arris S33. I have to say that the speed it takes me is really satisfying. Keep in mind that this is just a modem, and you need a separate router. (Something I didn’t know before purchasing.)

Robert S.

Why is it a suitable choice?

Replacing Xfinity Gateway with ARRIS S33

Firstly, the ARRIS S33 works well with any Xfinity Internet plan, but since it’s a gigabit DOCSIS 3.1 modem, it would make sense to only use it with high-speed plans such as the Xfinity Gigabit & Gigabit Extra.

Upon connecting this modem to a WiFi 6 router, I experienced the highest wireless throughput of 1167 Mbps in download and 191 Mbps in upload in a nearby speed test.

ARRIS SURfboard S33 Speed Test

Being one of the top-rated DOCSIS 3.1 devices, it allows you to experience 2 x 2 OFDM channels for enhanced data transmission. Additionally, it has backward compatibility, which allows it to run DOCSIS 3.0 connections from Xfinity too. However, the standard internet plans use 32 x 8 channel bonding.

Using the Ethernet ports to establish direct connections (2.5G or 1G) port lets you experience Gig-level speeds on devices. I tested the same with my Dell laptop and could get over 1187 Mbps in download and 97 Mbps in upload over a wired setup. The gaming and streaming performance had no latency and zero lagging instances.

Hardware & Other Features

The Broadcom multi-core processor makes sense, paired with 1GB (512MB x 2) of RAM. The existing setup allows you to cut through any form of congestion easily. Adding to this is the OFDM/OFDMA support that I already discussed.

And most importantly, the ARM-based chipset ensures that the integrated spectrum analyzer helps you prioritize specific transmission needs with urgency.

Design & Build

My dedicated review shows that it is a vertical, plastic-clad device replete with LEDs in the front and standard Ethernet, power, and coaxial cable ports in the rear. Making sense is the rounded structure that lends a sense of stability and solidarity to the entire device.

Also, this white-colored variant weighs 1.52 pounds and measures 5.24 x 5.24 x 1.65 inches, making it quite portable. And most importantly, there are heat-dissipating vents to help avoid overheating.


For a 1200 Mbps high-speed internet plan from Xfinity, S33 makes perfect sense. Its 2.5 Gig port, higher throughput, and seamless internet experience make it one of the fastest cable modems to use with Comcast Internet.


    • Latest networking standards
    • Multi-gigabit speeds
    • No overheating
    • Fresh design pattern


    • Pricey
    • Overkill for basic plans

3. Best Modem/Router Combo: ARRIS SURFboard G36

I’m not a big fan of modem/router combos, but if you’re looking for a combo that works best with Xfinity, consider the ARRIS G36. It has all the top-notch features of a modem & latest router features.

ARRIS G36 AX3000
  • DOCSIS Version: DOCSIS 3.1
  • Wireless Standard: Wi-Fi 6 (802.11ax)
  • Channel Bonding: 32 x 8
  • WiFi Coverage: Up to 3,000 Sq Ft
  • Suitable Plan: 1.2 Gbps
  • Ports: 1 x 2.5G + 4 x Gig Ethernet
  • Processor: Multi-gig
  • RAM & NAND Memory: 512MB + 256MB
  • App Support: Yes

Kicking off my list with the one that can support the Xfinity 1.2 Gbps plan. ARRIS G36, irrespective of its premium pricing, gets your money’s worth with high-end features.

It establishes itself as a future-proof device with DOCSIS 3.1 and Wi-Fi 6, alongside entailing a 2.5G WAN port which further adds a cherry on the top.

This is what users have to say about G36:

The monthly rental in my region just went from $10 to $14, this is what motivated me to buy my own device. The ARRIS G36 was recommended by Kurt, and I’ll have to say this is the best advice I took. Though a bit pricey, it will pay for itself in about 2 years, and then it’s basically free.

Richard M.

I have the Xfinity 1 Gbps plan and got G36 for my home. It is not disappointing at all, having all the latest features the combo acts perfectly with my plan. It provides smooth connectivity and stability due to WiFi 6 and stable throughput performance with all my connected devices.

Paul M.

OK, so the setup for this combo may not be the easiest (getting the technical support to activate the device on their network), but it sure is worth it. It is so much more convenient than handling two different devices. I don’t have a huge area to cover, so it’s literally perfect.

Richard J. Steppe

My main focus was to save on the rental charge. Honestly, the G36 was the perfect replacement for the Xfinity WiFi box. Easy installation, good connectivity, decent signal range, and excellent speed. It has been almost four months, and I don’t have any complaints so far.

Michael A.

Why is it a suitable choice?

ARRIS G36 vs Xfinity Modem Router Combo

The Surfboard G36 bestows excellent capabilities when it comes to speeds, which comes to its aggregated speeds of 3000 Mbps. It’s split into its two frequency bands as follows:

5 GHz: 2401 Mbps2.4 GHz: 574 Mbps

To deduce its real-time performance, I got it to pair with the Xfinity 1.2 Gbps plan and measured the speeds over both bands.

Boasting a much higher speed cap, the 5 GHz recorded download and upload speeds of 1121 Mbps and 59 Mbps, respectively. While on the other one, speeds unfolded at 548 Mbps and 29 Mbps.

ARRIS SURFboard G36 Speed Test

All the above-mentioned speeds were measured over a 25 feet distance. However, increasing the distance to 50 feet saw a tad dip in speeds (27-30%), but the signals were stable, courtesy of its 2 x 2 OFDM/OFDMA support.

This lets me glide through any high-bandwidth tasks like stock trading, online gaming, video conferencing, and others.

WiFi Coverage & Devices Capacity

The range of ARRIS G36 is quite expansive, with its two internal antennas claiming to cover 3,000 Sq Ft, which is great considering it is a combo device.

In my tests, the signals could extend up to 2,400-2,600 Sq Ft, which makes it an ideal fit for any three-bedroom apartment. Alongside, the beamforming support of antennas makes way for strong and stable signals everywhere.

Now, its device handling capacity is great when you judge it on the basis of a modem-router combo device. With technologies like OFDM and beamforming, I could connect up to 25 devices, including laptops, smartphones, smart TVs, and others.

Despite playing games for hours, the signal strength stays fine and I didn’t encounter any major lags or throttles.

Ports & Connectivity

This is the area where ARRIS G36 shines primarily because of one of its kind, 2.5 Gbps internet port. It allows users to pair multi-gig plans and experience high-speed gaming with higher FPS and lower ping.

Other than that, there are four Gigabit Ethernet ports with faster and more stable speed output. So, with this device setup, you can add a few more high-bandwidth devices to the mix without any issues.

Security Features

Being a combo device, expecting it to entail anything advanced features would be imprudent. But trust me on this, it has got enough to keep your home network and devices safe from any unwanted and external elements like cyberattacks and intrusions with key technologies like WPA2/WPA3 standards and an SPI firewall.

Moving on, in terms of parental controls, it lets you pause the internet at any time and get an overview of the total online time with its internet dashboard feature.


In conclusion, the spec sheet of ARRIS G36 translates well in the real life as I could attain almost the best performance in every aspect. Even, there is an integrated firewall that keeps any unwanted elements away from the network, making it the best combo choice for Comcast. Read G36’s full review to learn more.


    • Wi-Fi 6
    • Excellent speeds
    • Multi-gig 2.5G port
    • Great WiFi range
    • Decent security features


    • Premium price

4. Best for Voice: Netgear CM2050V

There are quite a lot of modems with phone ports, but when it comes to Xfinity, I’ve used most of them, and none of them is as good as the Netgear CM2050V.

Netgear Nighthawk CM2050V
  • Technology: DOCSIS 3.1
  • Downstream/Upstream: 32 x 8
  • Ports: 1 x 2.5G + 2 x Voice
  • Suitable Service Plan: Gigabit Extra (1.2 Gbps) + Voice
  • Modem/Router Combo: No

If you’ve subscribed to the Voice + Internet bundle, then the Netgear CM2050V is the ultimate solution that can handle Xfinity Triple Play. Also, it is a huge upgrade from the CM1150V, courtesy of the new design, a multi-gig port, and efficient hardware.

This is what users have to say about CM2050V:

I am so happy to be finally free of my monthly rent! This device is like a lifesaver. I have finally started utilizing actual speeds now. Though an expensive investment, the device is soon gonna pay for itself, and now the $14 monthly is part of my trip budget.

Margaret H.

I needed a modem that could support a telephone connection. Clearly, with RJ11 ports, built-in QoS and so much more, it was the perfect choice. It was easy to set up and all calling features work just fine. It’s simply great for Xfinity Voice + Internet bundle subscribers like me.

Justin B.

My roommates and I were finally done with the slow internet. We decided to swap a modem. CM2050V was obviously the best choice for us after thorough research. Although pricey for a modem-only device, it has made our connection much better. The impact on gaming and latency is real.

Kristen C.

It is really easy to set up if you know what you are doing. You must keep in mind that it works only with Xfinity. It is costly cause of the phone ports and I needed them for our office. Overall, it readily delivers with Xfinity Triple Play service.

Jeanette S.

Why is it a suitable choice?

Netgear CM2050V over xFi Gateway

The multi-gigabit modem features DOCSIS 3.1 technology and 32 x 8 channel bonding. It is known to support internet plans of up to 2500 Mbps on paper.

In my test with the 1200 Mbps plan, I could get a maximum download speed of 1167 Mbps and an upload speed of 189 Mbps in close range.

Netgear CM2050V Speed Test

As far as the ports are concerned, you get one 2.5 Gbps ethernet slot to get you multi-gig speeds. Plus, there are two phone lines to help you work with the Xfinity Voice service. The raw internet performance, full HD streaming, and gaming tasks were handled like a pro.

Design and Build

Netgear CM2050V looks great in all-black. Made of hardened plastic, it assumes the same vertical layout yet with a fresh look compared to its predecessor. It is also one of the more durable products, with dimensions set at 10 x 9.13 x 4.8 inches. There are also 7 LED lights on its front panel that indicate the status of the modem and connection.

Hardware & Other Features

Netgear doesn’t reveal much about its hardware, specifically the processing unit, RAM, and NAND memory. However, I could breeze through all of the intensive tests that require powerful hardware. It worked fine without getting warm or stuttering, cutting through browsing, streaming, gaming, and voice calling.

As for the other features, you get IPV6 compatibility, QoS functionality, and 2 x 2 OFDMA support for faster connectivity and an integrated bandwidth tuner for improved WiFi speeds.


Led by a 2.5 gig LAN port and two phone jacks, the CM2050V is the perfect modem for Xfinity Voice. It packs a punch and stands out among the existing competition. And to establish relevance, it works even better in business and office setups.

To learn more, check out my detailed review.


    • DOCSIS 3.1 technology
    • Xfinity Voice-compatible phone ports
    • Seven LED indicator lights
    • 2 x 2 OFDMA Channels
    • Efficient hardware & performance
    • Built-in QoS


    • Expensive
    • Works only with Xfinity

Alternative Product Suggestion:

If you want a cheaper option with telephone ports, consider the ARRIS SURFboard T25. It offers DOCSIS 3.1, 32 x 8 channels. However, it comes with an Intel Puma 7 chip, which is inferior to most Broadcom chips.

5. Best Voice-Capable Combo: Motorola MT8733

Motorola MT8733 AX6000
  • DOCSIS Version: DOCSIS 3.1
  • Channel Bonding: 32 x 8
  • Suitable Plan: Gigabit Extra (1.2 Gbps) + Voice
  • Ports: 1 x 2.5G + 3 x Gig + 2 x Voice
  • Wireless Standard: Wi-Fi 6 (802.11ax)
  • WiFi Coverage: Up to 2,500 Sq Ft
  • App Support: Yes

Motorola MT8733, an upgrade to MT8702, has taken a step forward both in terms of modem and router specifications, be it speeds, standard, or processing ability.

The latest offering establishes a perfect balance between features and its cost with DOCSIS 3.1, WiFi 6 standard, and two phone ports with features like HD calling, conference calls, and others.

This is what users have to say about MT8733:

My work demands frequent calls, so I decided to get a combo device with a telephone port. Although it made the purchase quite expensive but is totally worth it. However, it’s not flexible enough since I would not be able to use it with other service providers in the future.

Joe L.

I tried paying for $14 per month but there was always some issue with the network. So I decided to get myself a replacement. It was easy to set up, and I liked its design. The connectivity is strong and stable for every corner of my apartment. Highly recommended!

Barbara J.

Set up was as easy as ABC. The app made the process very smooth. It was easy to add the network to my Xfinity account and activate it. The available technologies make the signal stronger even in long range. So if you need a compact modem router combo this one is it.

Ann M.

I usually spend my time playing on Xbox and PS5. Motorola MT8733 has 4 ethernet ports and the experience was quite good. I had my doubts considering it was a combo. But rest assured it had no major lags, the speed was good and I could easily game for long hours.

Jason J.

Why is it a suitable choice?

Using Motorola MT8733 on Xfinity

MT8733 boasts an aggregated speed of 6000 Mbps, bettering my previous recommendation, which is distributed over the two bands as follows:

5 GHz: 4804 Mbps2.4 GHz: 1147 Mbps

It instills two telephone ports, making it a perfect fit for people who want to make calls via the Internet. Xfinity has bundle (gigabit + voice) plans specially catered to them, and pairing the same with the combo device produced excellent results.

The download and upload speeds were measured at 955 Mbps and 38 Mbps over the 5GHz band, while the values averaged 887 Mbps and 29 Mbps on the 2.4GHz band.

Motorola MT8733 Speed Test

Its best part is the inclusion of OFDMA, MU-MIMO, and beamforming, so signals over a long-range stay stable. So speed drop was less than Arris G34, valuing around 35% over 30 feet.

WiFi Coverage & Devices Capacity

Coverage is where MT8733 falls a tad behind Arris G34, as it failed to envelop my client’s 2,500 Sq Ft house completely. It left a few weak and dead spots in the nooks, taking its actual range at around 2,000 Sq Ft.

Nevertheless, the aforementioned technologies, OFDMA, MU-MIMO, and beamforming, made sure signals didn’t lose their strength and stayed stable over time. These technologies also boosted its device handling capacity, as 23-25 devices, including laptops, gaming consoles, and smart TVs, could stay connected at a time.  

Ports & Connectivity

Aside from two telephone ports for internet-based calling, there are four Ethernet ports with Gigabit speed holding capabilities.

So, the bandwidth-hungry devices should feed through these and run without making any fuss. My Xbox 360 was plugged in, and with boosted download and upload speeds of 994 Mbps and 247 Mbps, I played RDR2 at 70fps for around six hours.

Security Features

Motorola MT8733 loses a couple of points in this department with not many free/advanced security features available for customers.

It entails a few handy features like VPN passthrough, WPA2, attack protection, and IP/MAC/port filtering, but lacks standard ones like firewall, guest access, and even advanced ones like malware protection.

Moving on, parental controls also stay on the same page with just a few basic features like WiFi pausing and tracking online time. If you seek advanced features, consider subscribing to third-party antivirus powered by Tenda Micro and Bitdefender.


With this modem router combo by Motorola, there’s a scope available for you to enjoy high-speed internet on your available devices without any lags. The speeds available with this device make it a holy grail for gamers, streamers, and workers.

It’s a tad more expensive than my previous recommendation but stays behind in coverage and ranks second. Want to learn more about it? Read the full review.


    • Two phone line support
    • Easy to install
    • Excellent throughput capacity
    • Multiple Ethernet ports


    • Not compatible with non-Xfinity voice services

6. Best Value for Money: ARRIS SURFboard SB8200

The Arris SB8200 comes with 2 x 1 gig ports which makes it highly suitable for Xfinity plans up to 1000 Mbps. In case you’re subscribed to Gigabit plan, and want to get rid of the monthly equipment rental then this is the perfect replacement.

  • Technology: DOCSIS 3.1
  • Downstream/Upstream: 32 x 8
  • Ports: 2 x Gig Ethernet
  • Suitable Service Plan: Gigabit
  • Modem-Router Combo: No

Although I can’t compare the Arris SB8200 with the above-mentioned Motorola MB8611 or the Arris S33, as the latter are suited for Xfinity Gigabit Extra i.e. 1200 Mbps, but if you’re on a lower plan, then it makes sense to get the Arris SB8200 instead of overspending.

Note: If you’re planning to upgrade your connection in the coming 1-2 years then it would make sense to get the MB8611 or ARRIS S33 as they’re future-proof compared to the SB8200.

This is what users have to say about SB8200:

This is my replacement for the previous modem with DOCSIS 3.0, and it works wonders with Comcast. Although the design is a bit outdated, the performance is not. It can stream 4K videos extremely well and supports link aggregation, which ensures speeds of up to 2 Gbps.

Howard J.

I have always had a hard time setting up a new device. The last time I set up a modem was 4 years back and it took me almost an hour to get it up and running. Fortunately, I had better support to save me this time. I used Xfinity app, entered device details, did a reboot, and done.

Carol H.

Why is it a suitable choice?

ARRIS SB8200 vs Xfinity Modem

This standard for simultaneous channel usage supports multiplexed data transmission via the 2 x 2 OFDM. However, as a user, you can always rely on the more conventional DOCSIS 3.1 standard with 32 x 8 channel bonding support for getting hold of exceptional speeds in usual circumstances.

Upon testing the SB8200 with a Gigabit plan from Comcast, I could get wireless download and upload speeds of 942 Mbps and 37 Mbps, respectively. With these speeds in play, I could play games with low latency and stream them without lag.

ARRIS SURFboard SB8200 Speed Test

There are two Gig Ethernet ports that allow pairing two wired connections into a better cumulative throughput, provided the ISP permits the same.

It also supports Link Aggregation, which ensures speeds of up to 2 Gbps for the location-specific Gigabit and Gig Pro plans.

Hardware & Other Features

Coming to the hardware setup, the processor is complemented by 3GB of RAM, which is instrumental in keeping the speeds and connections more consistent than usual. Assisting with the exceptional processing setup is the availability of DOCSIS 3.1 technology.

I am skeptical about modem performances and technologies, but the SB8200 puts every speculation to rest with a standard Broadcom chipset. So take a sigh of relief if you are wary of those defective Puma chipset-powered modems.

Besides, the Arris SurfBoard SB8200 is also compatible with Spectrum, Cox, Mediacom, WOW, Midco, and Sparklight. So if you plan to switch to a different ISP, you can do it without hassle.

Design and Build

It weighs 1.52 pounds and measures 5 x 2 x 5 inches, giving it a rectangular form. I found it to be highly durable and well-constructed. The meshed side panel doesn’t heat up while streaming and gaming incessantly.

However, the four front-facing indicative LEDs, followed by the standalone coaxial port at the rear, adhere to conventionalism.


The Arris SB8200 is the best gigabit modem, owing to the optional DOCSIS 3.1 support and 2 x Gig Ethernet ports. Also, compared to other contenders on the list, including the MB8600 from Motorola, the SB8200 supports better speeds and exceptional 4K streaming.

Want to know more? Read my in-depth SB8200 review.


    • Reliable hardware configuration
    • Excellent cost vs value ratio
    • Link aggregation support
    • Handles 4K streaming
    • No overheating
    • Easy to set up


    • Old design

7. Best for 800 Mbps: Netgear CM1100

Netgear CM1100 is priced more than most of the competitors and is capable of handling Gigabit Internet. However, I suggest my readers to use it for the Superfast 800 Mbps plan because it’s always a good idea to buy a device that comes with slightly higher capacities but is in the budget range.

  • Technology: DOCSIS 3.1
  • Downstream/Upstream: 32 x 8
  • Ports: 2 x Gig Ethernet
  • Suitable Service Plan: Superfast (800 Mbps)
  • Modem/Router Combo: No

Would you be interested in a no-frills Netgear modem that is great at its job and doesn’t leave a hole in your pocket? Well, that is the CM1100 — which is a tad better when it comes to latency than the older CM1000. And if you seek highlights, this is one of the more future-proof modems in the picture.

This is what users have to say about CM1000:

Setting up any device these days with the Xfinity app is getting quite easy. I had Netgear CM1100 good to go in like 15 minutes. Its speed is really good and well I like the sleek design of the modem. The wired connection is the best. However, you must keep in mind that there is no router support.

Clara D.

It has link aggregation support is a unique feature for this range. So if you need a modem for your home or office that already has a mesh setup you can definitely choose CM1100. I have it in my house and the connectivity is smooth and seamless. The OFDMA tech ensures that my connection is consistent.

Greg M.

Why is it a suitable choice?

Netgear CM1100 vs Xfinity Performance

First of all, the compatibility stands out— meaning you can use this networking device with any given Xfinity internet plan across regions (excluding the fiber connections). The device also features DOCSIS 3.1 networking technology with backward compatibility.

There are 32 x 8 downstream and upstream channels in play, allowing you to reach maximum download and upload speeds of up to 900 Mbps and 50 Mbps, respectively (wired connections only). And helping you achieve that are two Gig ethernet speeds that connect quickly and easily to gaming consoles and streaming devices.

Netgear CM1100 Speed Test

As far as real-time speeds are concerned, upon testing it with the Gigabit plan, and could churn out 952 Mbps in download and over 32 Mbps in upload. Since I got such high speeds in the Gigabit plan, it’ll perform much better on the 800 Mbps connection.

Design and Build

The Netgear CM1100 comes in black, features a rugged structure with an adequate number of vents, and even has a basal stand to keep the balance intact. There are 6 LEDs on the front panel, followed by the back-facing cable and power ports. And yes, the two ethernet ports do make sense.

Aesthetically, the networking device looks pretty basic. The plastic-clad layout measures 10 x 5 x 7 inches, with the weight being recorded as 1 pound precisely.

Hardware & Other Features

The ARM-based chipset deserves mention, as it works closely with 256MB of RAM and manages to keep gaming latency and ping to a minimum. As for the overall performance, the CM1100 boasts 2 x 2 OFDM/OFDMA compatibility— allowing you to access thicker data transmission channels.

The built-in QoS support prioritizes traffic to a whole new level, with or without the router. And to top it all off, you have link aggregation support to fall back on, allowing you to easily achieve multi-gig speeds.


To summarize, the Netgear CM1100 is a more easy-to-handle cable modem for Comcast that works well for high-quality streaming in a home or office environment. And its link-aggregation support is what separates it from the herd. Read my review.


    • Faster data transmission
    • Top-notch wired connections
    • Backward compatibility
    • Heat-dissipating vents
    • Link Aggregation support
    • Easy to configure


    • Basic design
    • No router support

8. Best Budget Combo: ARRIS SURFboard G34

  • DOCSIS Version: DOCSIS 3.1
  • Wireless Standard: Wi-Fi 6 (802.11ax)
  • Channel Bonding: 32 x 8
  • WiFi Coverage: Up to 3,000 Sq Ft
  • Suitable Plan: Gigabit (1 Gbps)
  • Ports: 4 x Gig LAN
  • Processor: Multi-Core
  • RAM & NAND Memory: 512MB + N/A
  • App Support: Yes

ARRIS G34 is undoubtedly the best modem router for a Gigabit plan from Xfinity. It comes with DOCSIS 3.1, Wi-Fi 6, and excellent near-band speeds. But unlike ARRIS G36 which I just reviewed, it misses out on a multi-gig port, which is why I suggest it for Gig internet.

Its maximum theoretical coverage of 3,000 Sq Ft. is the highest I have seen in any combo device. Besides, it replaces its predecessor with many upgrades in terms of throughput capacity, coverage, and overall performance.

This is what users have to say about G34:

I had an Xfinity Gigabit Plan and was looking for a modem router combo under budget. With DOCSIS 3.0 and Wifi 6, G34 was suggested by multiple resources. It had an easy installation process. The wireless coverage is also good and it can handle multiple devices.

Greg M.

The main reason I decided to own a device was to save the rental lease. However, I chose G34 due to its design. It is modern and aesthetically complements my decor. The performance is also as aesthetically pleasing as the design with amazing coverage.

Cynthia S.

Why is it a suitable choice?

ARRIS G34 on Xfinity Connection

Be it wired or wireless, ARRIS G34 bestows exceptional capabilities with the future-proof DOCSIS 3.1 and Wi-Fi 6 standards to boast aggregated speeds of 3000 Mbps. It’s distributed over the two bands as follows:

5 GHz: 2402 Mbps2.4 GHz: 574 Mbps

With such high aggregated speeds, I paired an Xfinity 1 Gbps plan, and its performance was expectedly impressive. Over the 5 GHz band, the downloads unfold at 924 Mbps while uploads at 37 Mbps. At the same time, the faraway band recorded respective speed values at 521 Mbps and 24 Mbps.

ARRIS SURFboard G34 Speed Test

Concerning networking technologies, G34 boasts a 2 x 2 OFDM/OFDMA support, making way for congestion-free data transmission. Speed values over a 30 feet distance, although showed a bit of dip (30%), the signals were stable and consistent. So, even at a distance, I could play Fortnite with my friends without being thrown out of the lobby due to a weak network.

WiFi Coverage & Devices Capacity

The performance of this device with respect to coverage is much better than any modem-router combos I have tested so far. Courtesy of its powerful antennas integrated with beamforming tech, signals could travel a maximum area of 2,500 Sq Ft. My client’s similarly spaced house was filled with powerful signals, including the corners.

Moving on, the OFDM support does wonders regarding device capacity. Rather than distributing a signal wave in all directions, it ensures all your devices receive signals of similar strength, enhancing its device handling ability. It could handle up to 25 devices at a stretch without producing any throttles or lags.

Ports & Connectivity

When it comes to combo devices, you can’t expect them to entail many ports. But, G33 makes an exception by including four of them on its rear panel, each supporting Gigabit speeds. Although they don’t support link aggregation, you can expect to get your downloads done at 989 Mbps while uploads at 301 Mbps.

So trust me on this, your gaming devices and smart TVs should run without any lags or latencies, with an added experience over wireless connections.

Security Features

Security is an area where the G34 has a middling performance. Right out of the box, its features include WPA2/WPA3 mix security standards and an SPI firewall that protects your network and client devices from unauthorized devices. But it lacks advanced protection from malware and malicious agents.

Regarding parental controls, it has only got features like WiFi pausing, scheduled access, and an internet dashboard for tracking online time.


Overall, ARRIS G34 is the best-rated router modem combo with some top-notch features, whether with respect to the modem or router. Its speeds and coverage are great, and networking technologies like OFDM make sure bandwidth-intensive tasks on multiple devices are hosted with ease. Check out its full review for more.


    • Reliable hardware
    • Excellent throughput and coverage
    • Decent security features
    • Excellent near-band speeds


    • Distance speeds aren’t great

9. Best for Comcast Business: Hitron CODA56

Hitron CODA56
  • Technology: DOCSIS 3.1
  • Downstream/Upstream: 32 x 8
  • Ports: 2 Gig Ethernet
  • Suitable Service Plan: Business Internet Gigabit Extra (1200 Mbps)
  • Modem-Router Combo: No

Next on my list is another quality multi-gigabit capable modem, Hitron CODA56, which packs so many good things under its hood.

Certified to use with Comcast Business internet plans, it brings in much faster DOCSIS 3.1 tech, a multi-gig port, and a beefy processor for faster streaming, gaming, and video conferencing. It brings along a number of upgrades compared to the model it replaces, thereby, better performance. 

This is what users have to say about it:

I had to change my modem untimely and decided to give CODA56 a chance after seeing so many positive reviews. It turned out to be so much better than my previous setup. It has increased my speed by 200 Mbps. The network performance is stable too. At this price, it’s a no-brainer!

Daniel K.

I was so fed up with those buffers during TV streams, but I recently changed my modem to CODA56 and it did fix the issue. Considering the price of Hitron, it felt like they were underselling themselves. It was perfect. Plus, it’s compatible with multiple providers, so I can switch and continue using it.

Earnest M.

Why is it a suitable choice?

Hitron CODA56 with Comcast Xfinity

Hitron CODA56, with its advanced technologies, claims to support internet plans of up to 2.5 Gbps. But currently, the maximum speed is 1.5 Gbps, Hitron says it’s a hardware issue and not software.

Anyway, I used the Business Internet Gigabit Extra (1.2 Gbps) plan and the TP-Link Archer AX7E75 router to gauge its wireless speeds.

With the testing device 20 feet away, the test system managed a download speed of 1126 Mbps and an upload speed of 181 Mbps. Separating it by 40 feet dropped speeds to 761 Mbps and 107 Mbps, respectively.

Hitron CODA56 Speed Test

Although speeds are good enough for any high-bandwidth tasks like video conferencing, streaming, and others, there isn’t any specialized technology for traffic management.

Design & Ports

CODA56 takes up a square profile with slightly round edges and is flat rather than vertical, as with most cable modems. It measures 9.76 x 9.41 x 4.21 inches and weighs 2.81 pounds, meaning the footprint is quite large.

But the top side is fully ventilated, which keeps the modem cool by dissipating most heat and, in turn, not disrupting the connection.

In the rear panel, there is a multi-gig port with a 2.5 Gbps speed capacity. Connecting my smart TV could yield up to a 38% refresh rate, with other devices taking up the bandwidth over a wireless connection.

Hardware Configuration

The manufacturer hasn’t revealed any information about what’s inside Hitron CODA56, but I can confirm that it’s indeed powerful. The device could easily soldier through most of my internet-bound tasks without producing a single lag or jitters in the connection.


To conclude, Hitron CODA56 does a great job of bringing a balance of features, performance, and cost. The speeds are good enough to undertake any business-oriented tasks and even others like gaming and streaming.

Powerful hardware ensures no lags, latencies, or jitters. But its limited compatibility with ISPs, bulky design, and delivery at fewer speeds than claimed has pushed it here.


    • 2.5 Gbps port
    • Excellent speeds
    • Powerful hardware
    • Easy to set up


    • Limited ISP compatibility

Xfinity Modem Requirements

Internet PlansDOCSIS versionDownstream channelsUpstream channels
300 Mbps and lower3.024 / 168 / 4
400 Mbps3.0248
1.2 Gbps3.1328
2 Gbps3.1328

Complete List of Xfinity Compatible Modems [Officially Supported]

Comcast has an official list of 83 supported modems or modem/router combos. However, some of the mentioned devices come with bad chipsets, which have overheating and other performance issues.

Model NameDOCSIS
Suitable PlanModem/Router ComboVoice
Bad Chipset
Arris G343.132 × 8Super Fast (800 Mbps)No
Arris G363.132 × 8Gigabit Extra (1.2 Gbps)No
Arris S333.132 × 8Gigabit Extra (1.2 Gbps)No
Arris S33v23.132 × 8Super Fast (800 Mbps)No
Arris SB61833. 016 × 4Connect More (200 Mbps) & LowerNo
Arris SB61903. 032 × 8Fast (400 Mbps)Yes
Arris SB82003.132 × 8Super Fast (800 Mbps)No
Arris SB8200v23.132 × 8Super Fast (800 Mbps)No
Arris SBG103. 016 × 4Connect More (200 Mbps) & LowerYes
Arris SBG6950AC23. 016 × 4Fast (400 Mbps)Yes
Arris SBG7400AC23. 024 × 8Fast (400 Mbps)Yes
Arris SBG7600AC23. 032 × 8Fast (400 Mbps)Yes
Arris SBG83003.132 × 8Super Fast (800 Mbps)Yes
Arris SBV24023. 024 × 8Super Fast (800 Mbps)Yes
Arris SBV32023. 032 × 8Super Fast (800 Mbps)Yes
Arris SVG2482AC3. 024 × 8Super Fast (800 Mbps)No
Arris T253.132 × 8Super Fast (800 Mbps)Yes
Arris TM822G3. 08 × 4Connect More (200 Mbps) & LowerNo
Arris TM822R3. 08 × 4Connect More (200 Mbps) & LowerYes
ASUS CM-163. 016 × 4Connect More (200 Mbps) & LowerNo
ASUS CM-323. 032 × 8Fast (400 Mbps)Yes
ASUS CMAX60003.132 × 8Gigabit (1 Gbps)No
D-Link DCM-3013. 08 × 4Connect More (200 Mbps) & LowerNo
Hitron CDA-CCC3. 04 × 4Connect More (200 Mbps) & LowerNo
Hitron CODA3.132 × 8Gigabit (1 Gbps)No
Hitron CODA563.132 × 8Gigabit Extra (1.2 Gbps)No
HUMAX HGD3103.132 × 8Gigabit (1 Gbps)No
Linksys CG75003. 024 × 8Fast (400 Mbps)Yes
Linksys CM30083. 08 × 4Connect More (200 Mbps) & LowerNo
Linksys CM30163. 016 × 4Connect More (200 Mbps) & LowerYes
Linksys CM30243. 024 × 8Fast (400 Mbps)Yes
Motorola B123.132 × 8Gigabit (1 Gbps)No
Motorola MB74203.116 × 4Connect More (200 Mbps) & LowerNo
Motorola MB76213. 024 × 8Fast (400 Mbps)No
Motorola MB86003.132 × 8Gigabit (1 Gbps)No
Motorola MB86113.132 × 8Gigabit (1 Gbps)No
Motorola MG73153. 08 × 4Connect More (200 Mbps) & LowerNo
Motorola MG75403. 016 × 4Connect More (200 Mbps) & LowerNo
Motorola MG75503. 016 × 4Connect More (200 Mbps) & LowerNo
Motorola MG77003. 024 × 8Fast (400 Mbps)No
Motorola MG87023.132 × 8Gigabit (1 Gbps)No
Motorola MG87253.132 × 8Gigabit (1 Gbps)No
Motorola MT77113. 024 × 8Fast (400 Mbps)No
Motorola MT87333.132 × 8Gigabit Extra (1.2 Gbps)No
NETGEAR C3700v23. 08 × 4Connect More (200 Mbps) & LowerNo
NETGEAR C62203. 08 × 4Connect More (200 Mbps) & LowerNo
NETGEAR C62303. 016 × 4Connect More (200 Mbps) & LowerNo
NETGEAR C6250-100NAS3. 016 × 4Connect More (200 Mbps) & LowerNo
NETGEAR C6300v23. 016 × 4Connect More (200 Mbps) & LowerYes
NETGEAR C69003. 024 × 8Fast (400 Mbps)No
NETGEAR C7000v23. 024 × 8Fast (400 Mbps)No
NETGEAR C7100V3. 024 × 8Fast (400 Mbps)No
NETGEAR C78003.132 × 8Gigabit (1 Gbps)No
NETGEAR CM5003. 016 × 4Connect More (200 Mbps) & LowerNo
NETGEAR CM6003. 024 × 8Fast (400 Mbps)No
NETGEAR CM700332 × 8Fast (400 Mbps)Yes
NETGEAR CM1000v23.132 × 8Gigabit (1 Gbps)No
NETGEAR CM1000-1AZNAS3.132 × 8Super Fast (800 Mbps)No
NETGEAR CM11003.132 × 8Gigabit (1 Gbps)No
NETGEAR CM1150V3.132 × 8Gigabit (1 Gbps)No
NETGEAR CM12003.132 × 8Gigabit (1 Gbps)No
NETGEAR CM20003.132 × 8Gigabit (1 Gbps)No
NETGEAR CM2050V3.132 × 8Gigabit Extra (1.2 Gbps)No
NETGEAR CAX30S3.132 × 8Gigabit (1 Gbps)No
NETGEAR CAX803.132 × 8Gigabit (1 Gbps)No
NETGEAR CBR7503.132 × 8Gigabit (1 Gbps)No
SMC Networks D3CM16043. 016 × 4Connect More (200 Mbps) & LowerNo
TP-Link ARCHER CR5003. 016 × 4Connect More (200 Mbps) & LowerNo
TP-Link ARCHER CR7003. 016 × 4Connect More (200 Mbps) & LowerNo
TP-Link CR19003. 024 × 8Fast (400 Mbps)No
TP-Link TC-76103. 08 × 4Connect More (200 Mbps) & LowerNo
TP-Link TC-76203. 016 × 4Connect More (200 Mbps) & LowerNo
TP-Link TC76503. 024 × 8Fast (400 Mbps)No
TP-Link TC-W79603. 08 × 4Connect More (200 Mbps) & LowerNo

Did You Get a Modem? What’s Next?

Now that you’re done with a modem purchase, the next thing to do is set it up. If you’re a complete novice, the following guide will be helpful. Let’s go!

  • Self-installing the connection
  • Activating your modem.
  • Returning your rented gateway.

How To Self-Install Your Modem on Xfinity?

It’s easy. Here are a few basic steps to follow:

  • Connect the coax cable to the modem and the power outlet, and turn on the switch.
  • Wait for the modem’s indicator light to become stable. It can take 4-6 minutes and may take longer if the device updates its firmware.
  • Finally, connect one end of the Ethernet cable to the modem and the other end to your computer or router. Your modem is now set up.

Check the step-by-step procedure here.

Activate Your Modem with Xfinity

Activating your new modem on Xfinity shouldn’t be a strenuous task unless you live in a paleolithic age. Just install the app, and follow a few simple steps as stated below:

  • Launch the app and sign up on the app by providing a few details like the plan you’re subscribed to, name, password, etc.
  • If you are already a primary user, sign in using the Xfinity ID and password.
  • Once you’re logged in, start activation by selecting your device and clicking on the activate tab.
  • Then, it will ask you to plug in the coax cable to the modem, and once it’s all powered up, the app will automatically check the connection.
  • It will automatically be activated once the process is complete.

Return the Rented-Xfinity Equipment

Like installation, returning Xfinity equipment is even simpler. Here are a few basic steps you must follow:

  • Log in to the official Xfinity site and click on the “equipment return” tab.
  • Tick off the products you want to return.
  • Select the reason for returning and click confirm.
  • Once confirmed, place the item in the original box.
  • Paste a UPS prepaid on the box and hand over the shipment to the delivery person.

Things To Consider When Buying a Modem

Here are a few things to consider when picking a modem compatible with Xfinity:

  • It must be compatible with Xfinity.
  • The modem should be capable of handling your internet plan. For instance, if you are subscribed to a 400 Mbps plan (Xfinity Blast!), then the modem should be capable of handling at least 600-700 Mbps. (This will avoid internet throttling)
  • If you’re on a gigabit plan, you need a modem with DOCSIS 3.1 and 32 x 8 channel bonding.
  • If you’re using Xfinity Voice, it must have a phone jack.
  • If you’re living in a large house, avoid a modem-router combo; rather, go with a standalone modem + mesh WiFi system setup for seamless connectivity and WiFi coverage in the entire house.
  • Decide whether you need performance or want to save cost. Standalone modem + router performs better than a modem-router combo but can get expensive depending on your chosen devices.
  • If you’re getting a device to get rid of the monthly rental, then consider getting a basic modem + router or a modem-router combo that supports your internet plan.
  • Know your requirements before choosing the right one.

Frequently Asked Questions

Can I use my own modem with Xfinity?

Yes, you can. Xfinity allows you to use your own equipment. But only a limited number of modems are compatible with the internet service, so check that out before making a purchase.

What type of modem does Xfinity support?

Xfinity supports modems with DOCSIS 3.0 and 3.1 technologies. Depending on your subscription internet plan, you can choose a suitable modem. For Gig internet, choosing a device with DOCSIS 3.1, 32 x 8 channel bonding, and a good hardware setup is best.

How to replace the Xfinity modem with your own?

Here are the few steps you must follow:
– Plug out your Xfinity rented modem
– Once you’ve purchased a modem and plugged it in, you can use the Xfinity app to activate it.
– Connect your mobile or laptop to the modem and set up a network name and password
– Return your old modem

How long does it take to set up Xfinity’s internet?

Usually, it takes 50-60 minutes to install the modem, provided you are not accustomed to the process. Besides, it would need 10-15 minutes to activate and start using the internet services on your devices.

Should you buy a modem-router combo or a standalone modem?

You shall get a combo if you aim to save money on the rental and get good quality performance without spending a huge on the equipment. However, if you’re into gaming or live streaming, you should consider getting a standalone modem and a separate router.

How does the Xfinity VoIP service work?

The VoIP port on the modem converts the internet-specific voice service directly from the cable. The final signal syncs with the user’s telephone and supports voice-over IP. A basic telephonic connection over the cable internet service connects the VoIP modem to the telephone adapter as a part of a holistic unit.


Finding a cable modem that best suits your Xfinity connection isn’t easy, as you need competitive solutions that are better than rentals. Plus, the device must sync well with your internet plan, as overspending isn’t always advisable unless you plan to upgrade.

Considering these, here is a curated list of handpicked modems for specific use cases:

  • Motorola MB8611 is the fastest cable modem that works with Xfinity. Although it’s expensive, the features and performance it delivers get every penny of your investment worth.
  • ARRIS G36 is a top-tier modem-router combo. The best part is its compatibility with other ISPs and the latest standards in both modem and router, that too at a reasonable price.
  • If you’re interested in voice service, treat yourself with Netgear CM2050VMotorola MT8733.
  • If you want a cheap yet dependable option, Netgear CM500 is your best bet. Its features aren’t on par with those high-end devices but stay well ahead of the ISP-provided xFi gateways.

With that, I’d wrap up my recommendations!