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 and iOS 4.3 without requiring you to jailbreak your device

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 and iOS 4.3 without requiring you to jailbreak your device

http://rebelsimcard.com/rebel-micro-simcard-en.html

in reference to: 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 and iOS 4.3 without requiring you to jailbreak your device (view on Google Sidewiki)