@TMobileHelp How can this be resolved without going to the store? If that's the only solution, I'll be cancelling the service.
Even Verizon can figure this out, and they do nothing right.
@TMobileHelp So...I have an active account and was using T-mobile as the second line. Swapped phones, then called in to support to update the SIM to the new phone.
Was informed that the ONLY validation method was a text message to the number on the line, which isn't active.