As expected, iPhone Dev team has released an updated version of Ultrasn0w – v1.2.1 to fix the iOS 4.3.1 compatibility issues and to also the signal bar issue reported by users who had jailbroken their iPhone using PwnageTool, Redsn0w or Sn0wbreeze for iOS 4.3.1.
Ultrasn0w 1.2.1 To Unlock For iPhone 4, iPhone 3GS On iOS 4.3.1 Released; Also Fixes Signal Bar Issue
Sn0wbreeze 2.3 Beta 4 For iOS 4.3 Released; Allows Users To Unlock iPhone 4 Baseband 01.59.00, iPhone 3GS Basebands 05.13.04 Or Earlier Using Ultrasn0w
iH8sn0w has released a new version of Sn0wbreeze – v2.3 Beta 4, which will allow users to use Ultrasn0w to unlock iPhone 4 baseband 01.59.00 and iPhone 3GS basebands 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04.
MuscleNerd, member of the iPhone Dev Team has revealed that baseband – 04.10.01 that comes bundled with iOS 4.3 for iPhone 4 is vulnerable, which indicates that it can be unlocked if Apple does not update it in the final version.
MuscleNerd revealed this news via the following tweet:
Current i4 unlock goal includes til 04.10.01 (4.3b3). Very weird situation…vuln cmds are there, trying to invoke them!
Sherif Hashim, iPhone hacking expert who had figured out a way to activate iPhone without the need for the official carrier SIM has hinted that software method to unlock iPhone 4 will be released in less than a month.
Some users have reported significant loss of GPS signal after upgrading to baseband 06.15.00. iPhone Dev team has also confirmed that though baseband 06.15.00 is capable of GPS, it might require further hacks.
If you are observing poor battery life after unlocking your iPhone using a combination of PwnageTool or Redsn0w to update baseband to 06.15.00 and Ultrasn0w 1.2 for iOS 4.2.1 then you are not alone as some readers have reported the issue.
According to iPhone hacking expert, Sherif Hasim, it looks like the reason for the poor battery life issue is the hacktivation process used in PwnageTool and Redsn0w and not Ultrasn0w 1.2.
Apple had patched the exploit that allowed users to unlock their iPhone in iOS 4.1 released on September 8 so it has been a long wait for users who wanted to software unlock their iPhone to use it with any carrier.