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10-16-2010, 02:17 AM #1downgrading ios 4.0 jailbroken to 3.1.3
ive been reading thru the posts for about the last 2 hours trying to figure out how to downgrade my Jailbroken iPhone 3gs iOS 4.0 and ive tried a few of the options but none are really working for me. i want to get down to 3.1.3 so i can use my phone on my deck in my car that syncs with it. my model number is MC134J and my modem firmware is 05.13.04. my phone at one point did have 3.1.3 but i didnt jailbreak it until i was at 4.0. to get it jailbroken in the first place i had to downgrade from 4.0.2 and i still cant see why its not possible espically since 4.1 can be jailbroken now. if anyone knows a surefire way to accomplish this feat without me breaking my head on my desk for another 2 hours, then please pass the good word along. thnx.
10-16-2010, 12:57 PM #2
You cannot downgrade because you don't have 3.1.3 shsh blogs since you only started your jailbreak at 4.0. It is all about shsh blogs, without it, nothing can be done.
10-19-2010, 06:39 AM #3
hi, i've been having issues with my 3gs on 4.x and would like to downgrade to 3.1.3 again. issues include poor gps on 4.x and poor signal quality on 4.1.
i have my shsh numbers on saurik's server and have tried to downgrade to a custom/hacked 3.1.3 ipsw but keep getting errors (14 in recovery mode, 1600 in dfu mode). am i supposed to use a generic 3.1.3 instead of a hacked one? if i revert with a generic version of 3.x, will it update my modem firmware to the version that correspond to that version of 3.x or will it update it to the latest non-unlockable version? if so i will downgrade to an even earlier version in order to keep my modem firmware at version 05.11.07.
10-19-2010, 03:55 PM #4
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10-19-2010, 04:30 PM #5
i've tried using hacked/pwned ipsw's to get to 3.1.3 to see if the issues i'm having are 4.x related, but i keep getting errors 14 when in recovery mode and 1600 when in dfu mode and pointing to saurik's servers the whole time with my shsh numbers all backed up there.