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 MG7700 Modem WiFi Router Combo is a solid choice for those looking to avoid modem rental fees and ensure compatibility with major cable providers like Comcast Xfinity, Cox, and Spectrum. It supports DOCSIS 3.0 and offers a maximum modem speed of 1000 Mbps, which is suitable for internet plans up to 800 Mbps. This makes it an excellent choice for households with multiple users and devices, as it can handle high-speed internet needs effectively.

The built-in AC1900 dual-band Wi-Fi router with Power Boost enhances wireless performance, providing good speed and range for devices like smartphones, tablets, and laptops. The AnyBeam technology further optimizes signal focus on connected devices, improving Wi-Fi performance. Users will appreciate the four Gigabit Ethernet ports for reliable wired connections to computers and other devices. Additionally, the inclusion of firewall security and a Broadcom chipset adds an extra layer of protection against service attacks.

However, being a DOCSIS 3.0 modem, it does not support the latest DOCSIS 3.1 standard, which offers future-proofing for higher speeds. This modem-router combo is also not compatible with fiber optic, DSL, or satellite services, restricting its use to cable internet. For users with cable internet plans up to 800 Mbps, this device offers a competitive mix of performance, compatibility, and cost-saving potential.

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.