As we know . All iOS versions except for iPhone4 (4.1.1, 4.2.1, 4.3.1) had been unlocked by ULTRASN0W,But 4.1.1, 4.2.1, 4.3.1 can not unlocked by software .Gevey have release one Turbo sim .it can unlock 4.1.1, 4.2.1, 4.3.1 with Gevey Turbo sim .Your AT&T Locked phone is free to use .Also it can support 3G network .Internet and Mail.Like Before firmware Gevey .easy Used . No Jailbreak needed! No software unlock! Not breaking your warranty!
For all apple fans who have the iPhone4 (4.1.1, 4.2.1, 4.3.1) can use the Gevey sim unlock his Phone .
How to use the Gevey unlock sim card?
1. Close your phone, Put the unlock with your sim card into the sim solt .then put inside phone
2. Open the phone, Click accept when the SIM welcome Menu display on the phone
3. Do not do anything until get one signal when start will display "no server"
4. Call Emergency number .then hung up after 2 second.
5. Open the FLy model .and close again .Then will display "sim card activation failed”, After a while then displays "no sim card
6. The "no sim card" after the flight mode and then immediately turn off. Sim card activation fails there will be a few seconds and then have the signal