11 Best Comcast Xfinity Compatible Modems & Combos in 2023 [For All Plans]

Xfinity charges $14/month for renting an xFi gateway. Although the device is sufficient for basic use, the rental is not worth the money. The good thing is you can avoid paying it by getting your own Xfinity compatible modem. However, not all devices work with your internet provider. So, how do you pick the right one?

You cannot choose a modem or modem/router combo just because it’s compatible with Xfinity. Also, you need to make sure that the device is also capable of handling the speeds of the subscribed internet plan, has enough ports for your requirements, comes with latest standards such as DOCSIS 3.1, and many more things.

The 7 Best Modems for Xfinity (Comcast) in 2023 [High Compatibility + Support]

Comcast has an official list of 83 supported modems or modem/router combos. However, some of the mentioned devices come with bad chipsets, which shall cause overheating and other performance issues. To help you find the right equipment, I tested 17 devices for different factors such as throughput, latency, signal transmission, and efficiency and finally picked the 10 best options for 2023.

The list consists of high-end models at the top, followed by mid-range contenders, and affordable options at the end. Here we go:

1. Best For Xfinity 1200 Mbps: ARRIS S33

It doesn’t matter what your requirements are; if you’re looking for the best, there’s nothing as good as the Arris S33. Based on the results from my first-hand tests, the device can handle Xfinity’s fastest Gigabit Extra (1200 Mbps) without any issues.

If you are into gaming, streaming, or setting up bandwidth-hungry IoT connections at home or office, you might consider the ARRIS Surfboard S33. It is a better upgrade over the below-mentioned SB8200, owing to the availability of a multi-gig port, making it #1 on this list.

Why is it suited for Comcast Xfinity?

Firstly, the Arris S33 works well with any internet plan from Xfinity by Comcast, but it makes sense to buy it for a 1200 Mbps service plan. I used it with the same package and was amazed by the speeds, throughput, and latency.

Being one of the best-rated DOCSIS 3.1 modems, 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. Upon connecting this modem to a Wi-Fi 6 router, I experienced the highest wireless throughput of 1167 Mbps in download and 191 Mbps in upload in 5GHz mode.

Using the Ethernet ports to establish direct connections (2.5G or the 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 of the Surfboard S33 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.

Conclusion

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

2. Best Xfinity Gigabit Modem: ARRIS SB8200

If you plan to get a top-notch modem replacement for Xfinity Gigabit (1000 Mbps) that cut out the rentals, the Arris Surfboard SB8200 is one of the most appropriate options to invest in. Compared to the SB6190 or other Arris modems that work with Xfinity, the SB8200 boasts better networking standards and higher throughput.

Why is it suited for Comcast Xfinity?

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 Comcast Gigabit internet, I could get wireless download and upload speeds of 942 Mbps and 37 Mbps, respectively. As far as the performance is concerned, I could play games with low latency and stream them without lag.

There are two Gig Ethernet ports that allow pairing two wired connections into a better cumulative throughput, provided the ISP permits the same. Moreover, it also supports Link Aggregation, which ensures speeds of up to 2 Gbps for the location-specific Xfinity Gigabit and Gig Pro plans.

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.

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.

Design and Build

It just 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.

Conclusion

The Arris SB8200 is best for Xfinity Gigabit, 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.

3. Best From Netgear: Nighthawk CM1100

Wireless routers from Netgear work smoothly with their modems, so if you’re planning to get a Netgear router to make your connection wireless, you can totally rely on the CM1100.

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.

Why is it suited for Comcast Xfinity?

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.

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.

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.

Conclusion

To summarize, the Netgear CM1100 is a more easy-to-handle cable modem for Comcast that works well for high-speed home or office connections. And its link-aggregation support is what separates it from the herd.

Read my review: Netgear CM1100 Review: Is It Worth Getting in 2023?

4. Best For Gaming: Motorola MB8600

Are you a gamer seeking low latency? MB8600 is the best gaming modem. All thanks to AQM technology and powerful hardware.

Motorola MB8600 has exceptional AQM (Active Queue Management) support, making it a reliable cable modem for gaming, streaming, and similar stuff.

You could also get Motorola MB8611, newer than the MB8600 but with higher speeds. However, many users still prefer the MB8600 as there are few differences or upgrades.

Why is it suited for Comcast Xfinity?

I ended up testing the MB8600 with Xfinity’s Gigabit and Blast! service plans, only to see it outperform every other contender in its price segment. Talking about numbers, when paired with the Gigabit plan, I could witness a download speed of 901 Mbps. And with the Blast plan, I was getting over 393 Mbps.

Upload speeds, on the other, were restricted to 50 Mbps, which is okay considering that DOCSIS 4.0 technology isn’t already here.

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. Plus, the AQM enhancement ensures better traffic prioritization. As far as actual, real-time performances are concerned, the MB8600 minimizes latency for online games.

Hardware & Other Features

Motorola persists with a basic ARM-specific Broadcom processor, which 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 the DOCSIS 3.1 standard.

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 and Build

The dimensions read 7.25 x 7.88 x 2.25 inches. Also, it weighs close to 1.20 pounds, which is one the manageable end of things.

The aesthetics are pretty standard, with the MB8600 featuring several LED indicators for additional insights. Also, the upright design and darker color patterns ensure that the device syncs with any home décor arrangement.

Conclusion

Overall, Motorola MB8600 is one of the most promising modems I’d recommend for gaming and streaming. Compared to other devices on the list, I feel the latency is much less on the MB8600, thanks to efficient hardware and AQM.

You can also read my detailed review of the Motorola MB8600.

5. Best Xfinity Cable and Voice Modem: Netgear CM2050V

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

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 setup.

Why is it suited for Comcast Xfinity?

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. And in my test with the 1200 Mbps plan, I could get a maximum download speed of 1152 Mbps and an upload speed of 85-95 Mbps in close range.

As far as the ports are concerned, you get one 2.5Gbps ethernet slot to get you multi-gig speeds. Plus, there are two phone lines to help you work with the IP bundles offered by Xfinity, allowing you to connect the landline phone to the modem. 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 indicates 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.

Conclusion

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 of the Netgear CM2050V.

6. Best For 800 Mbps: Motorola MB7621

Next on my list is the best mid-range modem for 700-800 Mbps (Super Fast Plan). Motorola MB7621, despite its affordable price, instills some handy features like DOCSIS 3.0 support, ISP compatibility, and 24 x 8 channel bonding.

The modem also brings numerous upgrades from its older model, MB7420, in terms of channel bonding, throughput capacity, and others, which translates to the overall performance.

Why is it suited for Xfinity?

As mentioned, Motorola MB7621 is compatible with any Xfinity plans below 900 Mbps, so I paired the available 800 Mbps plan. And the performance was decent. The modem is backward compatible, which means you can pair any low-tier internet plans if you wish to.

So, I tested my Dell laptop’s download and upload speeds, and the values stayed close to 734 Mbps and 28 Mbps, respectively. Irrespective of connecting other devices like gaming consoles and smart TVs, its performance exceeded my expectations.

But the signals might suffer at a distance, as it lacks technologies like QoS, MU-MIMO, beamforming, or MU-MIMO. Connecting a router void of such technologies dropped the speeds by almost 70%, while with my TP-Link Archer X90 had a minimal drop of 40%.

Ports & Connectivity

The modem majorly lags in this department with only one Ethernet port. It supports Gigabit plans and speeds, with the 800 Mbps panned out at 797 Mbps and 214 Mbps, respectively, for downloads and uploads. An upgrade in speeds means your gaming and streaming experience should improve, as I noticed a drop in ping value from 10ms to 8ms.

Conclusion

In conclusion, Motorola MB7621, costing under $100, boasts a decent range of features to become a device ideal for any residential setup. Paired with any mid-tier Xfinity plans, you can stream UHD movies or play casual games with minimal lags. Overall, it’s a great value-for-money device to invest in.

For more information, check out the detailed MB7621 review.

7. Cheapest Modem: Netgear CM500

Looking for the best modem to pair with Xfinity 400 Mbps and other low-tier internet plans? Nothing can beat the Netgear CM500 in terms of features, price, and performance.

For budget seekers, Netgear CM500 is a good modem for Comcast Xfinity. It offers better speeds than the older CM400, which could only support 100 Mbps internet plans.

Why is it suited for Comcast Xfinity?

Purchasing CM500 for a 400 Mbps plan makes sense, courtesy of the DOCSIS 3.0, 16 x 4 channel bonding, and backward compatibility with DOCSIS 2.0 hardware components. I tested the same with the Blast plan and could get wireless speeds of over 362 Mbps. The maximum upload speed scored 22 Mbps.

Coming to the port arrangement, Netgear brings one Ethernet port into the mix, which is justifiable considering the price. And while it works well with Xfinity plans, you can also consider this for Cox and Spectrum internet plans.

Design and Build

The CM500 assumes a standard structure with well-positioned air vents to prevent overheating. You get 5 LEDs for getting the hang of the network status on the front, whereas the rear panel houses the cable input and the power port. The product weighs 0.62 pounds and measures 2.4 x 4.9 x 7.3 inches.

Hardware & Other Features

Broadcom BCM33843 chipset makes this device cut through interference with ease. There is 128MB of RAM to rely on, which helps you handle gaming latency like a pro. Next in line is 8MB of NAND flash memory, perfectly capable of storing the firmware details on the device. Regarding additional features, the CM500 boasts QoS support for enhanced traffic prioritization.

Conclusion

In case you seek a cheap device to set up internet across a standard household or the home office, Netgear CM500 comes across as one of the better options around. Find more in my in-depth review of the Netgear CM500.

Best Modem Router Combos For Comcast Xfinity [Updated For 2023]

Since I’m a power user and like more control, I prefer using a standalone modem + separate router. However, modem router combos are great for basic use.

These devices are nothing but a combination of both modem and router in a single device which means, you don’t have to get a separate WiFi router to make the connection wireless.

Below are the 4 Xfinity compatible modem/router combos that I recommend after testing over 8 different devices:

1. Best for 1200 Mbps: ARRIS Surfboard G36

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

Why is it suited for Xfinity?

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 Mbps

2.4 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.

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.

Conclusion

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.

2. Best for Gigabit: ARRIS Surfboard G34

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 that 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.

Why is it suited for Xfinity?

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 Mbps

2.4 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.

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 similar 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.

Conclusion

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.

3. Best with Telephone Ports: Motorola MT8733

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.

Why is it suited for 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 Mbps

2.4 GHz: 1147 Mbps

It instills two telephone ports, making it a perfect fit for people who want to make calls via the Internet. And 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.

Its best part is the inclusion of OFDMA, MU-MIMO, and beamforming, so signals over a long-range stay stable. And 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.

Conclusion

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 Motorola MT8733 full review.

4. Best Budget Combo: Netgear C7100V

If you don’t have much to spend but don’t want to compromise much on features, then Netgear C7100V should be an ideal pick. Aside from DOCSIS 3.0 and Wi-Fi 5 support, it instills a standard port setup alongside a 1.6GHz processor to deliver great performance.

And compared to its older model, C7000, it has got high-speed ports, a powerful processor, and high throughput capacity.

Why is it suited for Xfinity?

The dual-band Wi-Fi 5 C7100V boasts an aggregated speed of 1900 Mbps, distributed over two bands as follows:

5 GHz: 1300 Mbps

2.4 GHz: 600 Mbps

The built-in modem and router are decently fast, courtesy of DOCSIS 3.0, with 24 upstream and 8 downstream channels. In my throughput tests, I measured download and upload speeds over the 5GHz and 2.4GHz bands, and the results were impressive.

On the near band, the respective values with Xfinity Super Fast + voice plan were around 742 Mbps and 24 Mbps, while for the 2.4GHz band, it was 524 Mbps and 18 Mbps. The combo further comes with beamforming to ensure reliable connection on client devices, and the signals were stable even at a fair distance.

At 30 feet apart, the signal strength, however, dropped by 60%, the lowest among the devices I have tested so far. And at longer distances, you can only work with low-end tasks like browsing, music streaming, and others.

WiFi Coverage & Devices Capacity

Netgear C7100V ingrains three dual-band internal antennae to envelop my client’s 1500 Sq Ft house. Despite lacking key technologies like OFDMA and QoS, signals weren’t very weak, and I could stream youtube videos in the nooks.

There’s, although, an MU-MIMO that boosts its multiple device handling capacity, and I could pair around 15 devices without dropping signals much.

Ports & Connectivity

The modem-router combo gains some pointers in this area with a plethora of ports, four Ethernet ports, two telephone ports, and two USB ports. The Ethernet ports come with Gigabit speeds capability, with download and upload speeds maximizing at 963 Mbps and 187 Mbps in my tests.

Its telephone ports entail a range of advanced features like conference calling, HD calling, call forwarding, and others, making it ideal for people who want to make voice calls over the internet. Besides, two USB 2.0 ports provide scope for connecting peripheral devices and transferring data to USB drives.

Security Features

C7100V doesn’t really shine in this department, with only a few basic features like WPA2, DoS attack prevention, and VPN, and lacks ones like firewall and malware protection.

Nevertheless, these features are only viable for basic network protection and can’t secure the data you store and transfer through your devices. Similar is the case with parental controls, as you only have the option to track the time your kids spend on the internet.

Conclusion

To conclude, Netgear C7100V is a budget modem router combo offering several handy features to establish a perfect balance with its price. Its coverage and security aren’t top-notch, but it is enough for any mid-range house with a limited number of devices.

Xfinity’s Modem List [Officially Supported Devices]

Modem Requirements Based on Internet Plan

Internet Plans	DOCSIS version	Downstream channels	Upstream channels
300 Mbps and lower	3.0	24 / 16	8 / 4
400 Mbps	3.0	24	8
1.2 Gbps	3.1	32	8
2 Gbps	3.1	32	8

Bought a Modem? What To Do 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 shall be helpful. Let’s go!

• Self-installing your Xfinity Modem
• Activating your modem.
• Returning your rented Xfinity gateway.

How To Self-Install Your Own 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.

For more detailed steps & clarity, you may read my Xfinity self-installation guide.

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 Xfinity 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.

For more detailed steps, check out my Comcast modem activation guide.

Return the Rented-Xfinity Equipment [Steps]

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 Comcast compatible (it should be a device listed in their official Xfinity-supported modems list.)
• The modem should be capable of handling your internet plan. For instance, if you’ve subscribed to a 400 Mbps plan (Xfinity Blast!), then the modem should be capable of handling at least 600-700 Mbps.
• 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

Verdict

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 are some curated and handpicked suggestions for specific use cases:

• ARRIS S33 is the fastest cable modem for Xfinity. Although it’s a tad expensive, the features and performance it delivers get every penny of your investment worth.
• ARRIS G34 is a top-rated modem router combo that works well with Xfinity Gigabit. 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 a modem with voice support, treat yourself to Motorola MT8733.
• If you want the cheapest option, Netgear CM500 is the best pick. Its features aren’t on par with those high-end devices but stay well ahead of the ISP-rented modems.

With that, I’d wrap up this Xfinity modem list. Don’t forget to tell me which one you’ve gone for in the comments below!