Rebel Micro simcard Requires No Jailbreak Exclusive*** Rebel Micro Sim Card Unlocks iPhone 4 basebands 1.59.00 / 03:10.01 / 02.10.04 / 04.10.01 running iOS 4, iOS 4.1, 4.2, 4.2.1, 4.3 & 4.3.1 4.3.2 4.3.3 & IOS 5 Beta without requiring you to jailbreak your iPhone 4 The Rebel Micro unlock Simcard is specialy Designed for the iPhone 4 and is able to by pass the network lock that restricts you from using other networks simcards.3 Designs to use to unlock your iPhone 4 Rebel Pro Micro Sim Card is supplied with its own custom iPhone 4 Sim tray so the IC stays inside the iPhone 4 and is our Flagship Product Firmware Upgradeable.Rebel Xpress Micro Unlock Simcard uses the Latest Micro Chip the F981 and is a Flat IC & Non Firmware Upgradeable but the IC sits in the iPhone 4 like the Pro Version.Rebel Lite Micro Sim Card does not require a special iPhone Sim tray and the IC is located on the outside of the iPhone 4 when installed and is designed for Budget users.