Considering the, will Sprint take some initiative for its customers, jump ahead of this and start supporting unlocked CDMA phones? How Do I Unlock My Samsung Galaxy S3 Phone here. From what I've read, the Sprint justification doesn't seem to hold water. Its not difficult to say, Sprint ONLY supports CDMA phones with these frequencies (and then list'em). Currently I'm stuck w/ a phone I don't like. Almost a 10-year customer, but I can't upgrade early (eligible in Oct) and I can't buy an unlocked phone I found because Sprint won't activate it. Can You Unlock A Sprint Iphone 5 For Boost Mobile more. I can buy a sprint phone at full price, but shelling out over $600 isn't going to happen. How To Unlock Service On Iphone on this page. Locking a customer into a sprint-only phone they're not happy with due to performance issues and not giving them options doesn't strike me as good customer service.