MB8611 Gigabit Extra 1200/200 Certification

Same question here. Looks like the modem should be capable of higher upstream speeds.

@user_l3tafh Could you please send our team a direct message. Our team can most definitely take a further look at this issue.To send a "Direct Message" ("Private") message:
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@XfinityDanielB @user_l3tafh 

Can the question be answered here in these public help forums so that all readers here may benefit from the information ???

"Motorola" modems aren't made by Motorola.  They're made by a company called Minim under a license from Lenovo, which holds the Motorola trademark.  Minim has had some financial problems lately and laid off 78% of their staff last September https://finance.yahoo.com/news/minim-reduces-staff-78-bankruptcy-035900900.html  I don't have any information on DOCSIS 3.1/OFDMA support for faster upload speeds, but given Minim's problems I can guess where that's likely going.

The trap I fell into was receiving an email from Xfinity stating Gagabit Ertra (1200/200) was available in my area (metro Atlanta).  It also listed modem model numbers for the upgrade.  My original service was Gigabit (1000/40) using a Surfboard 8200.  I really wanted the upgrade for 200 upload. Based on what I saw in the email, purchased an Arris S33.  It did not work so I purchase another, and it did not work.  After three home visits from Xfinity, I, like everyone, else learned the Arris modem was not certified.  I then read a tread that made me think Motorola MB8611 would work, so I order one.  Then read another thread confirming it would not work, and the same individual exchanged it for a Hitron Coda56.  It worked no problems.  I have ordered a Coda56 and will receive it in a week or so.  In the meantime, I’ve retuned the Arris modems (Thank you Amazon).  Can’t return the MB8611, I purchased on Ebay.  This is the reason for my original inquiry about the MB8611.  If I had received a definitive reply about the MB8611, then the Coda56 would back to Amazon.  Somebody at Xfinity should know for both the MB8611 and A33.

It's my pleasure @XfinityPaula ! 😊

The mb8611 isn’t on the approved list anymore, tho I use it with superior results…

@Jlavaseur 

It's still on the list. It's just not among the "Recommended" anymore.