The iTurbo sim Ultra S GSM unlocks your GSM iPhone 4S running iOS 7.1.1! It's a true plug-and-play unlock for GSM iPhone 4S running iOS 6.0 - 7.1.1 TheiTurbo simUltra S is a thin microprocessor that sits between your network SIM card and the base-band hardware, allowing you to use your GSM iPhone 5 on all worldwide GSM networks.

Nano iturbo CS iPhone 5S/5C Unlock sim card easy to work Default AT&T ,Default T-Mobile and Etc all carrier