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My Sprint iPhone 4S worked fine on CDMA networks in the US, and it worked fine while traveling internationally on GSM / non-CDMA networks. There's something go
by nanidin 12y ago
My Sprint iPhone 4S worked fine on CDMA networks in the US, and it worked fine while traveling internationally on GSM / non-CDMA networks.
There's something going on in the baseband firmware that rejects domestic carrier SIM cards, but still allows international carriers when an international unlock is granted.
- pkamb 12y agoYes, my newly "unlocked" Sprint iPhone 5 will work fine overseas. It's specifically on non-Sprint domestic carriers where it won't work.