If you have seen a performance deterioration and want to downgrade your iphone 3g to the previous version then this tutorial will take you through the step-by-step process to downgrade from ios 4 to iphone os 3.1.3.. For those users here is guide on how to downgrade iphone 3gs 3.1 to 3.0 firmware. please note: with this guide you can only downgrade your firmware but not baseband. even after downgrading iphone 3g3.1 to 3.0 your baseband will be still 05.08.01 .. This video illustrates the method of downgrading the iphone 3gs firmware from version 3.1.3 to version 3.1.2. the process is composed of the following steps -step 1download the iphone 3gs firmware version 3.1.2 from the internet..
Saurik, the creator of cydia, has come up with a way to downgrade the iphone 3gs from firmware 3.1 to firmware 3.0.the method is not for the faint of heart but it can be a life saver if you accidentally upgraded your iphone 3gs to 3.1.. Jay freeman (saurik), the developer behind the infamous cydia store for iphone has found a way to downgrade iphone 3gs from firmware 3.1 to firmware 3.0. this process will only work for those who have saved their shsh to cydia server, for more on shsh, read the complete detail blog post by saurik here.. Iphone 2g and iphone 3g users can follow the guide posted here in order to downgrade firmware 3.1 to 3.0.1. the following step-by-step guide will help you downgrade iphone 3gs from firmware 3.1 to 3.0. step 1: download iphone firmware 3.0 for iphone 3gs. (download link given below)..
