How to unlock iPhone 4 on iOS 4.0.1 with Ultrasn0w

By | August 4th, 2010

The highly awaited iOS 4.0.1 unlock for iPhone 4 is available now, right after the jailbreak was made public. It is now possible for iPhone 4 owners running iOS 4.0.1 locked to AT&T to unlock their device and use with the carrier of your choice. Follow the list of instructions below to proceed with the unlock.


Note: If you haven’t already, update your iPhone to iOS 4.0.1 which can be downloaded from this link. Now jailbreak your device using the JailBreakMe 2.0 (Star).


  • Open Cydia on your jailbroken iPhone and go to Manage -> Sources.
  • Now tap on edit and then add the following repository     and tap on “Add Source”

  • After the update is complete, search and install “ultrasn0w 1.0-1” to unlock the iPhone. Restart you iPhone to finalize.

Notice: HardwareInsight does not support or endorse the unlocking procedure on this page.