If you switch from Tmo to Big Red for your mobile service, you will need to set up a completely new Softcard Account.
Sigh ... Really? guess i wont bother and stick with google wallet. This isn't worth the trouble. If these carriers want this stuff supported they need to let us move accounts because this is just dumb imo
It is a bit annoying when Verizon , ATT and T mobile are all using the same service with Softcard. But if Google wallet is working for you keep it.