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user_ac3751
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11/12/2026 8:56 PM

Motorola MB7621

I got an email yesterday that says I need to replace my Motorola MB7621.  It didn't say when or if Xfinity will stop official support for it, and I can't find it listed anywhere on the EOL devices list or in the list of devices with expiring certificates.

How long will this modem continue to operate on the Xfinity network?  I don't mind replacing it, but it is in a rental home 600 miles away from me and I am not planning to visit again until May 2027.  The winter renters will be coming in soon and I don't want any disruption to their service.

Any insight?

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31 seconds ago

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XfinityEva

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2 hours ago

@user_ac3751 Thank you for taking the time to reach out about this update. This device is end-of-life (EOL) and not included in the
approved customer owned device list at this time. I understand it may not be an option at this time to exchange it, so you may still choose to use it, but Xfinity cannot ensure it will support plan speeds or activate successfully.

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user_ac3751

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Thanks.  I understand that it is not currently in the supported list, but it was when it was installed.  Additionally, in the My Equipment page of the Xfinity account, it says Your modem is optimized for the plan you selected

It is oviously already active on the account.  My question is whether the modem will continue to work until my next visit so that I can exchange it while I'm there.

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2 hours ago

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XfinityAldrik

Official Employee

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2.9K Messages

The device is currently grandfathered on the account allowing it to be currently activated @user_ac3751. The Motorola MB7621 is a DOCSIS 3.0 cable modem not compatible with DOCSIS 3.1. As a device marked EOL, the manufacturer will stop sending security and firmware updates. This can cause issues with protecting your data upon not receiving the latest security updates from the device’s manufacturer.

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Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
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36 minutes ago

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user_ac3751

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Thanks.  However, I don't need technical information or information about the manufacturer.  I need my question answered:

My question is whether the modem will continue to work until my next visit in 2027 so that I can exchange it while I'm there.  I need to know if Xfinity has plans to disallow this modem on the network before the end of Q2 next year.

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12 minutes ago

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XfinityAldrik

Official Employee

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2.9K Messages

Being grandfathered on the account, the modem should continue to work. Being end of life prevents us from activating a new Motorola MB7621. Since it is currently on the account and active it will continue to function as it does now, but may start to have issues supporting the plan’s speeds and become more at risk of security threats @user_ac3751.

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please mark as Best Answer.tick

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31 seconds ago

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