[Athtar]

Did you switch your GV number to AT&T? Or did you use a new number?

I have been considering switching my GV number back to a cell carrier for a while, but I have heard/read that there might be issue doing that. Primarily with SMS/texting receipts, incoming calls from other GV numbers, etc.

[davux]

I didn't port (and wouldn't for the MMS/landline issues alone, I think) - I did it all 'on top' of an at&t and an ipkall.com/SIP/asterisk number.