Which cell carriers are gsm and which are cdma? and which of those has

tulipshadow

New member
phones with sim cards? I'm trying to buy 3 blackberries and unlock them for my US Cellular service (switching back from Sprint) but my current US Cellular phone does NOT have a sim card, so what do I do to activate the blackberry? Buy a cheap phone with a SIM card and transfer that? I'm so confused. Does GSM vs CDMA matter in this situation?
 
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