Does apple still signs iOS 4.1 for iPhone 3GS.?
I have iPhone 3GS , iOS 4.1 , bb 6.15, new bootrom.
I have only shsh blobs for iOS 6.1.3. So I can only upgrade to That iOS .
My questions are;
1.How to restore to iOS 6.1.3 using that blob?
2.Then I know the procedure to jailbreak(tethered) . After that can I unlock using ultrasn0w? (need to do anychanges in bb For unlock ?)
3.If apple signs iOS 4.1 still, then can I revert back to iOS 4.1 from 6.1.3 (if I don't like 6.1.3) if yes means then the procedure Plzz ...
Thanks in advance ...
The question has been closed for being "Solved" by Tilerone, 18 Jun '14, 12:06
to downgrade your baseband with redsn0w 0.9.15b3 you will also need your 6.0 ipsw file, even if you're on 6.1.2 or 6.1.3. you wouldn't need it if you're on ios 4.1.
the 3gs only goes to 6.1.3 so SHSH are not needed. you only use ifaith to make a custom ipsw to save your 05.13 baseband from upgrading and losing your unlock.
Make sure you have not installed iTunes 11.1 if you have you'll need to uninstall and re-install iTunes 11.0.
Uninstall Apple Application Support, Apple Mobile Support, iCloud and iTunes 11.1. Then install iTunes 11.0.0 from the link to downgrade or re-restore with an iFaith 6.x ipsw.
This answer is marked "community wiki".