Update:
Radio finally came in last Friday (after waiting 2.5 months) and had the faulty radio swapped out on Monday. So far so good, as far as getting AT&T myVehicle account reactivated with the new radio, per the AT&T rep, their database has already been updated with the new radio IMEI & ICCID serial numbers. The Ram service tech must have already taken care of this. Good to know but IF AT&T still has the old radio IMEI & ICCID and you weren't provided this information from the dealership you can access it thru the Dealer Mode information screen by pressing and holding down on the bottom left and right corners of the screen. Should pop up in a few seconds, anything more than that then try again. Go to System Info and then Connectivity. You'll need to scroll down to see the ICCID number.