Motorola MB7621 Home WiFi Cable Modem

Last updated: August 31, 2022

When you go with this modem, you'll eliminate the rental fees that come with your cable modem. That means you'll enjoy a great deal of savings in the long run. The modem itself works with a large number of cable service providers, including Comcast Xfinity, Cox, Charter Spectrum, Time Warner Cable and RCN.

We looked at the top Modems and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Modem you should buy.

Product Details

Key Takeaway: To set this modem up, all you need to do is plug the modem into an outlet and then plug a Wi-Fi router into the modem.

In our analysis of 33 expert reviews, the Motorola Home WiFi Cable Modem placed 3rd when we looked at the top 14 products in the category. For the full ranking, see below.

From The Manufacturer

Model MB7621 is a 24×8 1,000 Mbps DOCSIS 3.0 cable modem certified by XFINITY from Comcast for speed tiers up to and including Comcast Xfinity Extreme Pro Internet 400. The MB7621 is also approved by Charter Spectrum, Suddenlink, CableOne, RCN and more. Owning this modem eliminates modem rental charges that are up to $132 per year. With easy installation, high-speed, Broadcom IC technology, broad compatibility, and superb customer support, Model MB7621 is the perfect choice for almost any cable modem user. 24 X 8 performance means that up to 24 cable data channels carry data from the Internet, twenty-four times faster than DOCSIS 2.0; and up to 8 channels carry data to the Internet. A Full-Band Capture digital tuner helps assure consistently fast speeds from your service provider. MB7621 does not include a WiFi Router or an adapter for telephone service (sometimes called cable telephone or digital telephone service). It includes a 10/100/1000 Gigabit Ethernet (GigE) port for a high-speed connection of a WiFi router, computer, HDTV, game station, or other Ethernet-capable device. Setup is fast and easy with a few quick steps set out in a Quick Start guide. Experienced USA-based customer support specialists are ready and willing to help if you need them. Model MB7621’s compact, attractive design saves space and looks good in any home or office. This product is backed by a two-year warranty and features ruggedized lightning and power surge circuits to provide additional protection of your investment. DOCSIS 3.0, 2.0, and 1.1 support and Cable Labs certification ensure compatibility with services nationwide. Best of all, the MB7621 offers the value, performance, and attention to quality that continue to make Motorola the leading brand of cable modems. Please note that the MB7621 plugs easily into computers, HDTVs, and other Ethernet-capable devices including any router of your choice, but the MB7621 does not have a built-in Wi-Fi router or phone jack.

Expert Reviews

What reviewers liked

The MB7621 is less expensive and comes with a two-year warranty, a year longer than the CM600’s coverage.
It’s rated for speeds up to 650 Mbps, and it has an easy-to-use power button.

What reviewers didn't like

But it doesn’t appear on quite as many ISP approved modem lists as the Netgear modems; Cable One, Cox, and Comcast Xfinity all have the MB7621 on their online approved lists, but you’ll have to call Spectrum and WOW to make sure it will work on their networks and what speeds it will support.
It isn’t the most attractive or compact modem.
View our Modem buying guide for in-depth advice and recommendations.

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