iPhone Dev Team had released PwnageTool 4.3 few weeks back, which allows users who want to jailbreak and also unlock their iPhone to update their iPhone with a pre-jailbroken iOS 4.3.1 while preserving the baseband from getting upgraded so that it can be unlocked using Ultrasn0w.
This guide will provide iPhone 4 and iPhone 3GS users with step-by-step instructions to update and jailbreak their iPhone with iOS 4.3.1.Some important points before the step-by-step instructions:
- Please note that jailbreaking your iPhone may void its warranty so proceed with caution.
- Don’t forget to backup your iPhone before you proceed. You can refer to this post for instructions on how to backup your iPhone.
- Please ensure that your iPhone has enough charge.
- This guide is only for iPhone 4 and iPhone 3GS users.
- iPad, iPod Touch and iPhone users who don't care about unlocking or preserve their iPhone's baseband can use Redsn0w to jailbreak their iOS device on iOS 4.3.1 as it is a lot easier.
- PwnageTool is only supported on Mac OS X and is not supported on Microsoft Windows. Windows users should wait for Sn0wbreeze, which unofficial version of PwnageTool for Windows.
- Users who want to unlock their iPhone:
- PwnageTool does not unlock your iPhone.
- You can use Ultrasn0w to unlock your iPhone after you have successfully updated and jailbroken your iPhone with iOS 4.3.1.
- But there is a catch. Ultrasn0w 1.2.1 can only unlock the following basebands (you can check the baseband by going to Settings –> General –> About –> Modem Firmware):
- iPhone 4 baseband - 01.59.00
- iPhone 3GS basebands - 04.26.08, 05.11.07, 05.12.01, 05.13.04 and 06.15.00.
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- So if your iPhone is currently on baseband mentioned above then PwnageTool 4.3 will allow you to create a custom pre-jailbroken iOS 4.3.1 and preserve the baseband so that you can unlock your iPhone using Ultrasn0w 1.2.1.
- If you accidentally upgraded your iPhone 4 with iOS 4.3.1/iOS 4.3/ iOS 4.2.1/ iOS 4.1 then its baseband would have got upgraded to 02.10.04/ 03.10.01/ 04.10.01. Unfortunately, 02.10.04, 03.10.01, 04.10.01 basebands for iPhone 4 cannot be unlocked nor can it be downgraded currently.
- Similarly, if you accidentally upgraded your iPhone 3GS with iOS 4.3.1/iOS 4.3/ iOS 4.2.1/ iOS 4.1 then its baseband would have got upgraded to 05.14.02/ 05.15.04/ 05.16.01/ 05.16.02. Unfortunately, 05.14.02, 05.15.04, 05.16.01, 05.16.02 basebands for iPhone 3GS cannot be unlocked nor can it be downgraded currently.
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- After the jailbreaking process is complete, do not forget to checkout our article on tips to keep your iPhone secure. Also, remember to change the password of your jailbroken iPhone.
- Please read the instructions carefully especially the ones highlighted in bold.
If you meet the requirements mentioned above then you can proceed with the step-by-step instructions to jailbreak your iPhone using PwnageTool.
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How To Jailbreak Your iPhone 4, iPhone 3GS Using PwnageTool (iOS 4.3.1) – iPhone Hacks
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