# 📡 Is the Motorola MB7621 compatible with Xfinity/Comcast?

*Published: 2024-07-11 | Updated: 2024-07-21 | Source: https://shopsavvy.com/answers/is-the-motorola-mb7621-compatible-with-xfinitycomcast*

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## Product: Motorola MB7621 Modem
**Brand:** Motorola

Yep, the Motorola MB7621 Cable Modem works with Comcast Xfinity. It's also good to go with other providers like [Cox](https://www.shopsavvy.com/redirect?url=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3Dcox%26tag%3Dssw.ans.tx-1-20) and [Spectrum](https://www.shopsavvy.com/redirect?url=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3Dspectrum%26tag%3Dssw.ans.tx-1-20). 

The manufacturer mentions it's built for cable internet plans up to 900 Mbps. It runs on the DOCSIS 3.0 standard and has a 1 Gbps Ethernet port, so it's a solid pick when you pair it with a decent WiFi router.

Based on what we've found, a lot of folks have managed to get the MB7621 up and running with Comcast Xfinity without much hassle. Just a heads up—you'll likely need to contact your internet provider, like Comcast Xfinity, to give them the modem's MAC address for activation. It's a key step to get your connection started.

Once it's all set up, the MB7621 can handle multiple smart devices like TVs, laptops, and smartphones pretty well. But remember, to really use the modem's potential, your internet plan should match up with its capabilities. 

While it can handle speeds up to 900 Mbps, it tends to shine best with plans up to 650 Mbps, according to our data. Keep this in mind if you notice any speed or connectivity issues.

If you ever run into performance problems with Comcast Xfinity, it might help to double-check your setup or get in touch with Comcast support. Based on our research, some people have pointed out that the modem doesn't always hit top speeds on Xfinity, especially with uploads. 

This could be due to local network differences or other service-related factors. Overall, the Motorola MB7621 is a well-respected choice if you're after a cost-effective and capable modem for Comcast Xfinity.

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*Where this comes from: This answer is based on ShopSavvy's product database, real-time pricing from thousands of retailers, and analysis of user reviews to give you a well-rounded picture.*