Lets say you have either iPhone 4 or 3Gs on hands and it is running Apple’s latest firmware: the iOS 6. Is it possible to unlock it? Yes and the answer once again is yes. With the release of RedSn0w v0.9.15b1 recently, you can now jailbreak iOS 6 tethered on iPhone 4 as well as installing Cydia. And once Cydia is there, you can use UltraSn0w Fixer to unlock your precious iPhone. Ultrasn0w Fixer for iOS 6 will only work for iPhone 4 and iPhone 3GS users, and supports the following basebands: 01.59.00, 04.26.08, 05.11.07, 05.13.01, 05.12.01 and 06.15.00. So make sure your iPhone has one of those baseband versions.
Anyway, here’s the way how to unlock iPhone 4 / 3Gs on iOS 6:
Step 1:
Launch Cydia, and hit Manage, then Sources.
Step 2:
Then add the iparelhos repository.
If you’ve been organized and re-added your sources from iOS 5, then it should already be there, but if not, select Edit and Add, and type http://repo.iparelhos.com before hitting Add Source.
Step 3:
Open the repo and browse to the Ultrasn0w Fixer for 6.0 utility.
Step 4:
Next, tap the Install button and let Cydia work its magic.
Step 5:
Next, download the latest official iteration of Ultrasn0w from Cydia.
Step 6:
Simply install this Ultrasn0w, after which, your work is done.
That’s all. Your iPhone should now be unlocked and you can use your favorite SIM card.
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