Hi, newbie here appreciate some help ! I want to upgrade a iphone 3gs I have just bought on iOS 4.1 to 5.1.1 preserving the unlock and jailbreak if possible - plus ensuring I don't break anything like GPS / Wifi / Bluetooth. What would be the best way to do this , use Sn0wBreeze? Appreciate any advice here. Thanks
Upgrade iOS 4.1 to 5.1.1 preserving jailbreak and unlock - best way ?
- Thread starter marculos
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If to don't have the blobs, the only iOS you can upgrade to is the latest. In your case it would be iOS 6.1.3. That would be the one you just downloaded the blobs for, as you can only save blobs for an iOS version while Apple is currently signing it.
- Thread Starter
- #5
hmm shame that ! Not sure how well 6.1.3 will run on 3GS. Two questions next .. is there a recommended tutorial to upgrade to 6.1.3 without losing the unlock if possible with e.g redsn0w? And secondly, if I hate 6.1.3 is it possible to revert back to 4.1 ? Thanks
- Thread Starter
- #6
I found this guide .. Does preserving baseband mean that the phone would remain unlocked, or would I need to unlock the phone again somehow ? I don't have the original carrier SIM...
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Preserving the baseband is just what it says, it preserves the baseband, aka the modem firmware. You won't be able to unlock your device using UltraSn0w as your device is a new bootrom device and UltraSn0w is only compatible with the new bootrom 3GS on iOS 6.1 and below because there are no UltraSn0w Fixers for anything above 6.1.
Download a copy of iOS 4.3.5's IPSW for your device. Download RedSn0w 0.9.15 beta 3. Run RedSn0w as an administrator. Go to Extras > Even More > Restore.
Select IPSW, and point it to the 4.3.5 IPSW that you've downloaded. For blobs, select Remote. RedSn0w should pop up with a message asking whether or not you'd want to preserve your baseband and such, say that you do want to preserve your baseband. Let the restore process go through. At the end of the restore, use a Recovery Fix to kick the device out of Recovery Mode.
Select IPSW, and point it to the 4.3.5 IPSW that you've downloaded. For blobs, select Remote. RedSn0w should pop up with a message asking whether or not you'd want to preserve your baseband and such, say that you do want to preserve your baseband. Let the restore process go through. At the end of the restore, use a Recovery Fix to kick the device out of Recovery Mode.
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