I.P, I'm not sure what the carrier type has to do with google voice? I think maybe I should clarify more... I'm not looking to switch to T-Mobile, but I purchased a prepaid Sim card for like 99cents in order to port the RW number to that, then onto google voice. (So that I can forward to a work phone that was recently given to me)
I'm not looking to actually own a prepaid GSM phone, (but that may be my only choice if I cannot find somebody who has one to let me slip my SIM card in theirs for about 20 minutes).
Is my take-away correct: My options for using the prepaid SIM card (which is tied to my numberi want to port) to accept Google Voice's verification text or call are limited to either borrowing, or purchasing an unlocked, or T-Mobile prepaid phone that accepts Sim cards.