I was so tiered of waiting for sprint to carry the newer Blackberry models such as the Z30 that I jumped to T-mobile. Even though they don't sell blackberry themselves anymore, their network is open so I can enjoy the phone I want without having to wait for sprint to decide to carry the phones I want. In the past with sprint (and earlier with VZW) I would be waiting to see if they would carry a phone model I wanted. No more.. GSM has opened my eyes.