[HOW-TO] - Unlock iPhone 4, iPhone 3GS On iOS 5.0.1 With Ultrasn0w 1.2.5

• Ultrasn0w 1.2.5 to unlock iPhone 4 and iPhone 3GS running iOS 5.0.1 has recently been released. Ultrasn0w 1.2.5 does NOT unlock high basebands. 
• Only basebands mentioned below can be unlocked. Ultrasn0w 1.2.5 mainly brings support to iOS 5.0.1.

Ultrasn0w 1.2.5 Unlocks:

• 01.59.00
• 04.26.08
• 05.11.07
• 05.12.01
• 05.13.04
• 06.15.00

How To Unlock iPhone 4 / 3GS On iOS 5.0.1 With Ultrasn0w 1.2.5

STEP 1: You’ll need to jailbreak your iPhone 4 or iPhone 3GS running iOS 5.0.1 using Redns0w with our guide posted here.

STEP 2: Once jailbroken, head to Cydia -> Manage -> Sources.

STEP 3: Now tap on Edit -> Add then write down the following repo: http://repo666.ultrasn0w.com.

STEP 4: After adding the repo, search in Cydia for Ultrans0w and you’ll tap on it then hit install on the top right of screen.

• Respring and tethered boot
• Your iPhone 4 and iPhone 3GS unlocked.