Many cellular carriers will no longer support devices running on old software even if they are unlocked.
Apple iPhone 4 iPhone 4s Unlocked White Black 8GB 16GB 32GB CCD Camera Very Good
Apple iPhone 4 8GB/16GB/32GB Black/White UNLOCKED rare ios 4 ios 5 ios 7
Apple iPhone 4, 4s A1387, A1332
Original Apple iPhone 4/4s 8/16/32/64GB Fully UNLOCKED Black/White
Apple iPhone 4 CDMA A1349 Verizon phone
