5 Best Comcast Xfinity Recommended Modems 2025 in the United States

The ARRIS (S34) Cable Modem is a robust choice for those looking to eliminate rental fees from their cable provider. Its standout feature is the DOCSIS 3.1 technology, which is significantly faster and more secure compared to the older DOCSIS 3.0. This modem supports high-speed internet plans up to 2.5 Gbps, making it ideal for households with heavy internet usage, such as gamers or those who stream a lot of 4K content. It also includes a unique feature of switchable upstream filters, which can optimize upload speeds depending on your service provider's offerings.

It is important to note that this modem is not a built-in router, so you will need to connect it to a separate Wi-Fi router for networking. The device is straightforward to set up using the SURFboard Central App, ensuring a secure and hassle-free installation process. It is compatible with major U.S. cable providers like Comcast Xfinity, Cox, and Spectrum. The modem comes with two Ethernet ports – a 2.5 Gbps port and a 1 Gbps port, which combined can support up to 3.5 Gbps download speeds.

The modem's dimensions are 10.55 x 6.75 x 2.46 inches, and it weighs 1.43 pounds. If future-proofing your home network with the latest technology is a priority, the ARRIS (S34) is certainly a compelling option.

The Motorola MB8611 DOCSIS 3.1 Multi-Gig Cable Modem is designed for ultra-fast internet speeds, making it suitable for Comcast Xfinity, Cox Gigablast, and Spectrum users. It supports DOCSIS 3.1 standards, ensuring compatibility with the latest internet plans. With a maximum speed of 2,500 Mbps and a 2.5 GB Ethernet port, it can handle high-speed connectivity for demanding activities like gaming, streaming, and video conferencing.

One of its key advantages is its ability to work with any WiFi router, giving you the flexibility to choose the best router for your needs. However, it's important to note that the modem does not have a built-in router or telephone call capability, which may require additional purchases if you need those features. The Active Queue Management (AQM) enhances app performance by reducing latency, which is particularly beneficial for gaming and streaming.

Additionally, owning this modem can lead to significant cost savings by eliminating rental fees typically charged by internet service providers. The modem is built for reliability and comes with a 2-year warranty and free support from Motorola's USA-based technicians. Weighing only 1.1 ounces and featuring compact dimensions, the absence of built-in WiFi might be a drawback for some users, but it remains a solid choice for those who need high-speed internet and are willing to pair it with a separate WiFi router.

The Motorola MB8600 DOCSIS 3.1 Cable Modem is an excellent choice for users subscribed to gigabit internet plans with Comcast Xfinity, Cox, and Charter Spectrum. Its support for DOCSIS 3.1 and 3.0 standards ensures top-speed internet performance, making it ideal for heavy internet users who need fast and reliable connections for streaming, gaming, or remote work. A standout feature is its compatibility with a variety of routers, including advanced systems like mesh Wi-Fi, which allows for flexible network setups tailored to different home sizes and needs.

By using this modem, users can save a considerable amount of money on rental fees, potentially up to $168 a year. However, it's important to note that the MB8600 doesn't have a built-in router or telephone capabilities, which might require additional purchases if those features are needed. Additionally, it's not compatible with all service types, such as fiber optic, DSL, or satellite, so users should ensure their ISP is among the compatible ones.

The modem's single Gigabit Ethernet port provides a strong, dedicated connection to one device, which is suitable for connecting a high-quality router or a primary device. Although it lacks multiple Ethernet ports, its Active Queue Management and full-band capture digital tuner enhance internet speed and stability, reducing latency for applications like video conferencing and online gaming.

In terms of security, the built-in Broadcom chipset offers robust protection against denial-of-service attacks. With solid customer reviews and a good reputation in its category, the Motorola MB8600 serves as a reliable investment for users looking to maximize their cable internet service performance.