Which is Compatible 3.1.2 firmware for existing 2.2.1 (5H11)
I am using 16 GB 2G phone brought from US in Feb2008, jailbroken first with ziphone whereby bootloader was downgraded to 3.9; then restored and again jailbroken with iplus. Thereafter I Upgraded to firmware version 2.2.1 (5H11) a few months back. Now I am facing problem with SMS programme and want to upgrade to 3.1.2 version.
I read this forum and also iClarified - iPhone - How to Unlock/Jailbreak Your iPhone 2G on OS 3.1.2 Using RedSn0w (Windows), downloaded files but when I try to restore from iTunes using version 126.96.36.199, I get a message "iphone ___ could not be restored because the firmware file is not compatible.
I am currently having 2.2.1 (5H11) firmware though my phone is 2G. I checked on iclarified different versions of firmware and noted with surprise that there were two versions of 2.2.1 but I am using one for 3G though my phone is 2G. (Surprised how 3 G version of firmware working on 2G hardware or how my iphone is showing 5H11 instead of 5H1)) Two versions stated there are as follows :
2.2.1 (2G): iPhone1,1_2.2.1_5H1_Restore.ipsw
2.2.1 (3G): iPhone1,2_2.2.1_5H11_Restore.ipsw
A. Now that I am getting non-compatible firmware message with iphone1,1,3.1.2, should I try iphone 1,2,3.1.2 or should I try 3.0.1 version as follows :
3.1.2 (2G): iPhone1,1_3.1.2_7D11_Restore.ipsw (message non-compatible)
Should I try 3.0.1 (2G): iPhone1,1_3.0.1_7A400_Restore.ipsw OR
3.1.2 (3G): iPhone1,2_3.1.2_7D11_Restore.ipsw.
B. Whether I can use the Redsn0w version 0.9.2 for unlocking / jailbreak with 3.0.1 firmware.
C. What can be the reason for iTunes not finding 3.1.2 compatible with my iphone?