# 📶 What is the maximum internet speed supported by the Motorola MB7621 cable modem?

*Published: 2024-07-03 | Updated: 2024-10-10 | Source: https://shopsavvy.com/answers/what-is-the-maximum-internet-speed-supported-by-the-motorola-mb7621-cable-modem*

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

The Motorola MB7621 cable modem can handle internet speeds of up to 650 Mbps, according to the manufacturer's description. This should be more than enough for many broadband plans, so you can get the most out of your internet service.

If you're setting it up with [Comcast Xfinity](https://www.shopsavvy.com/redirect?url=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DComcast%2BXfinity%26tag%3Dssw.ans.tx-1-20), there are a couple of steps you'll need to follow. First, you'll have to contact Xfinity to activate your modem on their network. You'll need to provide the modem's MAC address, which is on a sticker on the device. Don't skip this step—otherwise, you might run into connectivity issues.

After you've registered the modem's MAC address, setting up is usually pretty easy. Although it's generally plug-and-play, it might be helpful to have Xfinity's support contact just in case you need any guidance. Sometimes, if your speeds are lagging, it might be due to a configuration issue with your ISP that Xfinity can help sort out.

Keep in mind, the MB7621 doesn't have a built-in wireless router, so you'll need to connect it to a separate WiFi router to get your devices online. Make sure your router's properly configured and maybe give it a reboot after setting up the modem; that often helps with connectivity hiccups.

While the MB7621 generally gets good marks for reliability, some folks have mentioned occasional signal drops or inconsistent speeds. These issues can often be linked to cable line conditions or needing a firmware update, something Xfinity can check out if you're experiencing trouble.

So, if your internet plan falls within its capabilities and it's set up properly, the MB7621 should work out well. Just keep an eye on the firmware updates and touch base with Xfinity if you hit any snags.

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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.*