Ultrasn0w 1.2.3. iPhone dev-team has released new version of ultrasn0w, they released ultrasn0w 1.2.3 to unlock iPhone 4 and iPhone 3GS on iOS 4.3.3 on old basebands. check out all supported basebands on ultrasn0w 1.2.3 after the jumpSupported basebands:
01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00
Unsupported basebands :
02.10.04 / 03.10.01 / 04.10.01 / 05.14.02 / 05.15.04 / 05.16.02
iPhone 3GS users:
You have to jailbreak your iPhone on 6.15.00 basebands on iOS 4.1 / 4.2.1, you can follow this guide for PwnageTool Mac or this guide for Redsn0w Windows / Mac (You may lose your GPS).
Requirement:
You have to jailbreak your iPhone 4 or iPhone 3GS on the latest iOS 4.3.3, you can follow This Guide (Untethered PwnageTool 4.3.3 for Mac) or This Guide (Untethered Sn0wbreeze 2.7 for Windows)
Step 1: Open Cydia on your iPhone 4 or 3GS, Go to Manage->Sources.
Step 2: Now tap on “Edit”, then tap on “Add”.
Step 3: Now search for ultrasn0w 1.2.3 then install it. By installing ultrasn0w 1.2.3, your device became unlocked.
Step 4: Finally, restart your iPhone and you should now enjoy an unlocked iPhone 4 or 3GS on iOS 4.3.3.Source URL: http://k12-information.blogspot.com/2011/10/unlock-433-iphone-4-3gs-ultrasn0w-123.html
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