I'm planning to buy my own modem (MB7621) to use instead of the that I'm currently renting from Comcast. I just wanted to confirm that Comcast Business supports that modem, and to understand what the steps are to make it work with Comcast.
I checked the compatibility page below and it seems MB7621 is compatible with my current plan. I also don't use Static IP or any incompatible other features listed on the pages below.
Thanks!
https://business.comcast.com/help-and-support/internet/use-your-own-comcast-business-modem-device/