Ultrasn0w 1.2.5 unlock tool for iPhone 4, iPhone 3GS on iOS 5.0.1 is released from iphone Dev Team. this is the latest update for the unlock tool that has been released from iPhone Dev Team so the previous update of Ultrasn0w 1.2.4. This released a month ago After the release of Redsn0w 0.9.9 beta from iPhone Dev team, this update is seen to be released.This update will enable to unlock all the iOS running on iOS 5,iOS 5.0.1 and iOS 5.1 .
This is what the Dev-team blog reports :
“ultrasn0w compatibility update (i.e. same baseband requirements) for 5.0.1 will be available on Cydia Monday”
All the iPhone can’t be unlocked using theUltrasn0w 1.2.5 but all the supported basebands has been listed below
Supported Baasebands for ultrasn0w 1.2.5 unlock on iOS 5.0.1
How to unlock iPhone 4,iPhone 3Gs,iphone 4S(not supported) with Ultrasn0w 1.2.5 running on iOS 5,iOS 5.0.1,iOS 5.1,iOS 5.2 :
The full tutorial and instruction here is to unlock only iPhone 4, iPhone 3GS, and iPhone 3G which can be carrier free and can be later used with any SIM carrier world wide. So first of all, you need to is Jailbreak your iPhone as we have provided the tutorial to jailbreak iOS 5 below:
Tethered jailbreak using Redsn0w 0.9.9 beta for iOS 5,iOS 5.0.1,iOS 5.1
Semi-tethered jailbreak using Redsn0w 0.9.9 beta for iOS 5,iOS 5.0.1,iOS 5.1
All the procedure needs to be carried out only if you have not updated into higher basebands as up to 06.15.00 baseband has been suported so you can jailbreak all the iPhone 4 and iPhone 3Gs and iPhone 3G having basebands 04.26.08, 05.11.07, 05.12.01, 05.13.04, 06.15.00, or 01.59 baseband(modem firmware).
So, thats all now you have unlocked your iPhone 4,iPhone 3Gs using Ultrasn0w 1.2.5. Congratulations!