Join Date:Joined: Nov 2013
I no little of your American networks but after a small amount of research I have found out that metropcs uses the t-mobile network that operates on 1900 MHz GSM and 1700 MHz UMTS.
Searching your phone it only matches the 1900GSM but not the 1700UMTS that t-mobile uses.
Is your wife's the exact same model? If not what is it?
Further to that you need to report this to a mod and have it moved to the at&t forums, this one is for the international version.