Want to unlock iPhone 4 on iOS 5 with Gevey SIM so if you gonna update iPhone 4 to iOS 5 firmware you will kill your unlock and your Gevey SIM, if you want to unlock your iPhone 4 on iOS 5 with Gevey SIM you MUST update your iPhone 4 to pre-jailbroken custom firmware to preserve the unlockable baseband, which are compatible with Gevey SIM. Gevey SIM is a hardware-based unlock, which allows users to unlock their iPhone 4, confirmed to be working on iOS 5 with older iOS 4.x baseband…………………
Many Gevey SIM unlock users are wondering if it is safe to use Apple’s latest operating system and t has been said that it will work if you preserve your baseband. By using either of these jailbreaks you can still use the Gevey SIM unlock, obviously you do this at your own risk. For unlock your iPhone 4 on iOS 5 you have to update your phone to iOS 5 and preserve baseband and in below you will find video guide to unlock iOS with Gevey Sim:
