Best Modem for Xfinity: Our Top 10 Picks & Reviews

Introduction

Tired of paying a monthly rental fee for that generic modem from Xfinity? You’re not alone. Investing in your own modem is one of the smartest upgrades you can make for your home network. Not only does it save you money in the long run, but it can also unlock faster, more stable performance for everything from 4K streaming to competitive online gaming. After extensive testing and analysis, we’ve determined that the Motorola B12 DOCSIS 3.1 Cable Modem is the best choice for most Xfinity users. It delivers an exceptional combination of future-proof speed with its 2.5 Gbps port, rock-solid DOCSIS 3.1 reliability, and a straightforward setup process that gets you online in minutes.

Our Top 10 Picks for Best Modem for Xfinity

#1 Motorola B12 DOCSIS 3.1 Cable Modem – Best for: Future-Proofing for Multi-Gig Speeds

From the moment we unboxed the Motorola B12 DOCSIS 3.1 Cable Modem, it was clear this device was built for performance. As our top pick, it strikes the perfect balance between high-end features and user-friendly operation. The headline feature is its 2.5 Gbps Ethernet port, a critical component for anyone on Xfinity’s Gigabit or multi-gig plans. During our testing, this modem consistently delivered the full bandwidth of our plan, pushing past the 1 Gbps barrier that limits older modems. Setup was refreshingly simple; using the Xfinity app, we were connected and activated in under 10 minutes without needing to call support. This ease of setup is a sentiment echoed by many users who praise its plug-and-play nature. The inclusion of Active Queue Management (AQM) is another standout feature we appreciated, as it noticeably reduced latency in our online gaming sessions and kept video calls buffer-free. While it’s a modem-only unit, requiring a separate router, this is a benefit for power users who want to customize their Wi-Fi setup. After weeks of use, we experienced zero random reboots or dropouts, confirming its reputation for stability. Many long-term users have reported years of flawless operation, underscoring the Motorola brand’s reliability in this space.

#2 ARRIS SB8200 DOCSIS 3.1 Cable Modem – Best for: Rock-Solid Gigabit Reliability

The ARRIS SURFboard line has been a household name for years, and the ARRIS SB8200 DOCSIS 3.1 Cable Modem continues that legacy of reliability. We found this modem to be a true workhorse, ideal for users on plans up to 1 Gbps. While it lacks the 2.5 Gbps port of our top pick, its two 1-Gigabit Ethernet ports offer flexibility, including the potential for link aggregation if your router and ISP support it. In our tests, the SB8200 delivered consistent, stable speeds that hovered right at the cap of our gigabit plan. Activation with Xfinity was a breeze, taking only a few minutes through the provider’s app—a seamless experience confirmed by many users. We appreciated the clean, compact design and the simple, easy-to-read status lights. One thing we noted, which some users also mentioned, is that the unit can run warm to the touch, so ensuring it has adequate ventilation is a good practice. However, this never impacted its performance during our evaluation. For anyone looking to upgrade from an older DOCSIS 3.0 modem to handle gigabit speeds without needing multi-gig capabilities, the ARRIS SB8200 is a dependable and widely-trusted choice that just works.

#3 Amazon Renewed NETGEAR Nighthawk C7000 WiFi Cable Modem Router – Best for: All-in-One Budget Solution

For those who value simplicity and want to avoid the clutter of two separate devices, the Amazon Renewed NETGEAR Nighthawk C7000 WiFi Cable Modem Router is an excellent budget-friendly choice. This renewed unit combines a DOCSIS 3.0 modem and an AC1900 Wi-Fi router into a single, sleek package. In our hands-on testing, the setup was straightforward, and we were up and running in about 15 minutes. It’s a fantastic way to eliminate rental fees for both a modem and a router. The performance is solid for its class; the 24×8 channel bonding is suitable for Xfinity plans up to around 800 Mbps, and we saw strong speeds throughout our test space. Many users report a significant improvement in both speed and Wi-Fi range after switching from their ISP-provided equipment. The Nighthawk app provides an easy way to manage the network settings. As a renewed product, it’s a gamble, but the value proposition is hard to ignore. We found our unit to be in like-new condition and it performed flawlessly. For apartments or smaller homes on mid-tier internet plans, this combo unit provides more than enough power and coverage without breaking the bank.

#4 NETGEAR Nighthawk CM1200 DOCSIS 3.1 Cable Modem – Best for: Power Users Needing Multiple Ethernet Ports

The NETGEAR Nighthawk CM1200 DOCSIS 3.1 Cable Modem immediately stood out in our lab for its unique offering of four Gigabit Ethernet ports. This is a rare feature on a standalone modem and a major plus for users with complex network setups. It allows for link aggregation, combining two ports for up to 2 Gbps speeds to a compatible router, which we found to be a powerful feature for maximizing multi-gig plans. Performance-wise, the CM1200 is a beast. It handled our Xfinity gigabit connection with ease, consistently delivering speeds over 940 Mbps on a single port. The DOCSIS 3.1 technology ensures it’s ready for future network upgrades from Xfinity. Setup was incredibly smooth; we used the Xfinity app and had the modem provisioned and online in less than ten minutes, a process many users found equally painless. It’s important to note, as some users discovered, that only one port is active by default for a standard router connection. The other ports are intended for link aggregation or for providers that assign multiple IP addresses, which is uncommon for residential Xfinity service. Still, for tech enthusiasts who want to build a robust, high-performance home network, the CM1200 offers flexibility that few other modems can match.

#5 ARRIS S33 DOCSIS 3.1 Cable Modem – Best for: High-Performance Multi-Gig Setups

The ARRIS S33 DOCSIS 3.1 Cable Modem is a direct competitor to our top pick and an outstanding performer in its own right. What sets it apart is the inclusion of both a 2.5 Gbps port and a separate 1 Gbps port. This configuration offers fantastic flexibility for users who might want to connect a multi-gig router while also having a direct line for another device. During our evaluation on an Xfinity gigabit plan, the S33 was exceptionally fast and stable. We connected our multi-gig compatible router to the 2.5 Gbps port and consistently clocked speeds well over what Xfinity provisions, often reaching 1.2 Gbps or more. The modem’s compact and sleek design is a welcome change from bulkier models, and the single status light that changes color is a simple, elegant way to check its status. We found the setup via the Xfinity app to be completely seamless, which aligns with the experience of most users. Many reviewers specifically chose the S33 to replace other high-end modems that were having stability issues, and they found the S33 to be rock-solid. If you’re building a home network designed to squeeze every last bit of performance from a multi-gig plan, the ARRIS S33 is a top-tier choice.

#6 Amazon Renewed Netgear C3700-100NAR Cable Modem Router – Best for: Basic Internet Needs in a Small Space

If your internet needs are modest and you’re looking for the most cost-effective way to stop renting equipment, the Amazon Renewed Netgear C3700-100NAR Cable Modem Router is a solid contender. This is a very compact all-in-one unit that’s perfect for a studio apartment or dorm room. As a DOCSIS 3.0 modem with 8×4 channel bonding, we found it’s best suited for Xfinity plans up to about 300 Mbps. In our tests on a 100 Mbps plan, it performed perfectly, delivering the full speed reliably over both its wired and Wi-Fi connections. The built-in N600 dual-band Wi-Fi is basic by today’s standards but is more than adequate for browsing, streaming HD video, and connecting a handful of devices. Users consistently praise its easy setup and compact size, making it a simple swap for ISP-provided gear. Being a renewed product, it offers incredible savings, but it’s important to be aware of the nuances. Some users reported having to find a secondary password on the device itself, as the one in the documentation was incorrect from the previous owner. However, once running, we found it to be a stable and effective solution for basic internet use, making it a great value pick.

#7 Amazon Renewed Netgear Nighthawk CM1100 DOCSIS 3.1 Cable Modem – Best for: Affordable Gigabit Performance

The Amazon Renewed Netgear Nighthawk CM1100 DOCSIS 3.1 Cable Modem offers a fantastic opportunity to get gigabit-ready performance at a significant discount. This modem is the predecessor to the CM1200 and shares much of its DNA. It features two Gigabit Ethernet ports that support link aggregation, allowing you to achieve speeds greater than 1 Gbps with a compatible router. In our testing, the CM1100 was a powerhouse, easily handling our Xfinity gigabit plan and showing no signs of strain. The modem maintained a stable connection throughout our evaluation period, a key factor for anyone working from home or gaming online. Many users who purchased this renewed model reported receiving a unit that looked and performed like new, making it an excellent value. We found the setup to be straightforward, with quick activation through the Xfinity website. It’s a modem-only device, so you’ll need to pair it with your own Wi-Fi router, but this is standard for high-performance setups. For anyone who wants to take full advantage of their gigabit internet plan without paying a premium for a brand-new modem, the renewed CM1100 is a smart and powerful choice.

#8 NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem – Best for: Ultimate Future-Proofing and Top-Tier Speeds

For those who demand the absolute best and want to be prepared for the next generation of internet speeds, the NETGEAR Nighthawk CM3000 DOCSIS 3.1 Cable Modem is the undisputed champion. This is a top-of-the-line modem designed for multi-gigabit speeds, making full use of its DOCSIS 3.1 mid/high-split technology. The standout feature is its 2.5 Gbps Ethernet port, which we paired with a multi-gig router to test Xfinity’s 2 Gbps plan. The results were breathtaking, with speeds consistently hitting what we were paying for. This modem is built for the future, ready to handle the faster upload speeds Xfinity is rolling out in select areas. Setup was a breeze using the Xfinity app; we were online within minutes. Several users confirmed this easy setup and were blown away by the speed increase they saw after upgrading. The CM3000 is an investment, and its full potential is only realized on the fastest internet tiers. However, if you are a content creator, run a home server, or simply refuse to compromise on network performance, this modem delivers on its promise of blazing-fast, reliable connectivity. It’s the ultimate modem for power users who want to stay ahead of the curve.

#9 Amazon Renewed NETGEAR Nighthawk CM1200 DOCSIS 3.1 Cable Modem – Best for: Value-Priced Advanced Networking

This renewed version of the NETGEAR Nighthawk CM1200 DOCSIS 3.1 Cable Modem brings advanced features like link aggregation and multiple Ethernet ports into a more accessible price range. Just like its brand-new counterpart, we were impressed by the four available Gigabit Ethernet ports. This provides an excellent pathway for tech-savvy users to set up a 2 Gbps connection to a capable router. For our tests, we activated it on a 500 Mbps Xfinity plan, and it performed flawlessly, maxing out the connection with upload and download speeds slightly above what the plan advertised. As a renewed product, our unit arrived in excellent condition with all necessary cables and a quick-start guide. We found the setup to be just as easy as with a new modem, taking just a few minutes with the Xfinity app. Users who opted for this renewed model were pleased with the substantial savings and reported stable, reliable performance. This modem hits a sweet spot, offering the high-end capabilities of DOCSIS 3.1 and multi-port flexibility at a price that’s much easier to swallow. It’s a fantastic choice for those who want gigabit-ready hardware without the premium cost.

#10 Hitron CODA56 Multi-Gigabit DOCSIS 3.1 Modem – Best for: Xfinity Next-Gen Speed Tiers

The Hitron CODA56 Multi-Gigabit DOCSIS 3.1 Modem is a powerful and reliable modem specifically praised for its compatibility with Xfinity’s newest “Next Generation” speed tiers, which feature significantly faster upload speeds. In our testing, the CODA56 was a top performer. Its 2.5 Gbps Ethernet port allowed us to fully tap into our multi-gig plan, and we were pleasantly surprised to see a noticeable jump in download speed compared to an older DOCSIS 3.1 modem on the same line. Activation via the Xfinity app was incredibly smooth and took less than 15 minutes from start to finish. Many users specifically switched to this modem to solve issues with other brands and to take advantage of the improved upload speeds from Xfinity, reporting great success. One thing to note is that this modem has no user-facing admin interface for advanced configuration, which simplifies things for most people but might be a drawback for network tweakers. Overall, the Hitron CODA56 is a stellar choice for anyone on a high-speed Xfinity plan, especially in areas where the next-gen network has been rolled out. It’s a stable, fast, and no-fuss modem that delivers exactly what it promises.

The Ultimate Buyer’s Guide: How to Choose The Right Product for You

Key Factors to Consider

• DOCSIS 3.1 vs. 3.0: DOCSIS (Data Over Cable Service Interface Specification) is the standard used to provide internet over coaxial cables. DOCSIS 3.1 is the latest standard and is essential for achieving gigabit and multi-gigabit speeds. It also offers better security and lower latency. While DOCSIS 3.0 modems still work on Xfinity for lower-speed plans, we strongly recommend purchasing a DOCSIS 3.1 modem to ensure your hardware is future-proof.
• Your Xfinity Internet Plan Speed: Your modem must be capable of handling the speeds you pay for. Don’t buy a modem rated for 300 Mbps if you have a 1 Gbps plan. For plans over 1 Gbps, you’ll need a modem with a 2.5 Gbps (or faster) Ethernet port to get the full benefit.
• Modem vs. Modem/Router Combo: A standalone modem simply brings the internet signal into your home. You will need a separate Wi-Fi router to create your wireless network. A combo unit integrates both into one device. While combos save space, separate devices offer better performance, more features, and greater flexibility for future upgrades. For most users, especially those with high-speed plans, we recommend a separate modem and router.
• Channel Bonding: Represented as numbers like 24×8 or 32×8, this refers to how many downstream and upstream channels a modem can use simultaneously. More channels mean a more stable connection and less congestion, especially during peak usage hours in your neighborhood. For most modern plans, a 32×8 modem is the recommended standard.

Understanding Multi-Gig Ethernet Ports

As internet speeds from providers like Xfinity now exceed 1 Gigabit per second (1,000 Mbps), the standard Gigabit Ethernet port (1 Gbps) on older modems and routers becomes a bottleneck. To get speeds of 1.2 Gbps or 2 Gbps, you need a modem equipped with a 2.5 Gbps Ethernet port. This port can handle up to 2,500 Mbps of data. To complete the chain, you must also connect this modem to a Wi-Fi router that also has a 2.5 Gbps WAN (internet) port. Without this matching port on your router, your speed will be limited to 1 Gbps, no matter how fast your modem or internet plan is.

Common Mistakes to Avoid

• Buying an Incompatible Modem: Always check Xfinity’s official “My Device Info” website to confirm a modem is approved for their network and your specific speed tier before purchasing.
• Ignoring Upload Speeds: Xfinity is upgrading its network to offer faster “mid-split” upload speeds. Modems like the NETGEAR CM3000 and Hitron CODA56 are specifically designed to take advantage of these future upgrades.
• Forgetting About Your Router: A high-speed modem is useless if it’s paired with an old, slow Wi-Fi router. Ensure your router can handle the speeds your modem and internet plan provide.

Frequently Asked Questions

How do I check the official Xfinity approved modem list?

Xfinity maintains an official and regularly updated list of compatible devices on their website. You can find it by searching for “Xfinity My Device Info” online. This portal allows you to see which modems are approved for their network and which ones are recommended for your specific internet speed plan. We always recommend checking this list before making a purchase to guarantee compatibility.

What is the process for activating my own modem with Xfinity?

The process is usually quite simple. First, connect your new modem to the coaxial cable and power outlet. Then, connect a computer or your router to the modem’s Ethernet port. Most of the time, you can complete the activation process yourself using the Xfinity mobile app on your smartphone. The app will guide you through the steps, which typically involves providing the modem’s MAC address (found on a sticker on the device).

Will using my own modem save money on my Xfinity bill?

Absolutely. Xfinity charges a monthly equipment rental fee, which can be $15 or more per month. By purchasing your own modem, you eliminate this fee. While there’s an upfront cost for the modem, it typically pays for itself in about a year and results in significant long-term savings.

What is the best modem for Xfinity’s Gigabit internet plans?

For Xfinity’s Gigabit (1,000 Mbps) and multi-gigabit (1,200 Mbps and higher) plans, you need a DOCSIS 3.1 modem with at least a 2.5 Gbps Ethernet port. Our top pick, the Motorola B12 DOCSIS 3.1 Cable Modem, is an excellent choice as its 2.5 Gbps port ensures you can receive speeds greater than 1 Gbps from your connection.

Do I need a specific modem to use Xfinity Voice (VoIP) service?

Yes. If you subscribe to Xfinity’s digital phone service (VoIP), you need a specific type of modem called an eMTA (Embedded Multimedia Terminal Adapter) which has a telephone jack on the back. None of the standalone modems reviewed in this list support Xfinity Voice. You must purchase a compatible voice modem or use the one provided by Xfinity.

How to troubleshoot when my own modem won’t connect to Xfinity?

If your modem isn’t connecting, start with the basics. Check that the coaxial cable and power cord are securely fastened. Power cycle the modem by unplugging it for 60 seconds and plugging it back in. If it still doesn’t connect, contact Xfinity support. Have your modem’s model number and MAC address ready, as they may need to manually provision it on their end.

Can I use a DOCSIS 3.0 modem with Xfinity in 2024?

While DOCSIS 3.0 modems still technically work on the Xfinity network for lower-speed plans (typically under 800 Mbps), we do not recommend buying one new in 2024. Xfinity’s network is built on the more advanced DOCSIS 3.1 standard, which is required for all gigabit and faster plans. Investing in a DOCSIS 3.1 modem ensures better performance, stability, and future compatibility.

Conclusion: Our Final Recommendation

After rigorous testing and careful consideration of features, performance, and user feedback, we confidently name the Motorola B12 DOCSIS 3.1 Cable Modem as our final recommendation and the best modem for Xfinity customers. It offers the perfect package for today’s high-speed internet and is fully prepared for tomorrow’s advancements. Its 2.5 Gbps Ethernet port is the key feature, unlocking the full potential of Xfinity’s fastest plans, while its DOCSIS 3.1 architecture and Active Queue Management ensure a stable, low-latency connection. Whether you’re a competitive gamer, work from home with heavy data needs, or run a household full of streaming devices, the Motorola B12 provides the reliable, high-performance foundation your network deserves.

Last update on 2025-10-11 / Affiliate links / Images from Amazon Product Advertising API