This makes it the world’s first free software solution to unlock iPhone 4. iPhone Dev team had already released Ultrasn0w 0.93 to unlock all basebands since iPhone OS 3.0 including baseband 05.13.04 that comes bundled with iOS 4 for iPhone 3GS and iPhone 3G users.
iPhone Dev Team announced the release of Ultrasn0w for iPhone 4 on their blog:
Version 1.0-1 of ultrasn0w works for:
iPhone4 baseband 01.59
3G/3GS basebands 04.26.08, 05.11.07, 05.12.01 and 05.13.04
Here are the steps that you can follow:
Please add the repo repo666.ultrasn0w.com to Cydia. That last “o” is actually the number zero “0”. If you use the letter “o” you’ll get an error.
Then search for ‘ultrasn0w’ in Cydia and install ultrasn0w. This should successfully unlock your iPhone.
T-Mobile USA users should disable 3G before using ultrasn0w.
You can also checkout the video that show you how to unlock iPhone 4:
We have already got confirmations from our readers that they’ve successfully unlocked their iPhone 4.
As always, let us know how it goes.
Thanks everyone for the tip!
Update: Added the video that shows how to install Ultrasn0w to unlock iPhone 4.