Downgrade iPhone
Downgrade iPhone 3Gs 3.1.3 To 3.1.2 For Mac
Let’s say you accidentally upgraded your iPhone 3GS to 3.1.3, then you managed to downgraded to iPhone 3.1.2 but facing the inconvenient result, because you are experiencing no service problem on the iPhone 3GS, then the tutorial of this post might become a helper to solves your no service problem after downgrading your iPhone
Downgrade Iphone 3gs 3.1.3 To 3.1.2 With SHSH On Cydia For Windows
Tutorial on how to downgrade Iphone 3gs 3.1.3, 05.12.01 via windows with SHSH on Cydia, if you want to downgrade your iPhone 3GS running on 3.1.3 to have your jailbreak back follow this simple tutorials Before following the tutorial: Firstly your iPhone must already been jailbroken and get your SHS backed up on Cydia 3.1.2 [...]
Downgrade iPhone 3.1 Firmware To 3.0.1/3.0
In my other post about Downgrade iPhone 3GS 3.1 to iphone 3.0 OS Firmware, I found that many people failed to downgrade their iPhone 3.1 to 3.0 but only few succeeded, therefore to assist iPhone OS 3.1 who wishes to downgrade to 3.1 but so far found nothing that actually works, I provide 1 Youtube [...]