Hello I have an iphone 3GS, it was jail broken to work with Indian networks. I upgraded accidently to IOS 6.1.2 through itunes, it gave me an activation error. It was displayng 15 digits number but ICCID display as unknown.
I took help from answers posted at thread "Cannot activate Iphone 3gs after IOS 6 upgrade". As per Answer provided by Sandkuma002, I downloaded iOS 6.1.2 IPSW, used Sn0wbreeze and shift+itunes restore to jailbreak and then installed Ultrasn0w. After these steps I could get all the icons on screen and Cydia working but SIM was not working. Iphone was reporting Modem firmware as 6.15, So I followed instructions to downgrade baseband to 5.13 with Redsn0w. In the process I needed to download IPSW 6.0 also. During downgrade process a long list of messages were displayed on iphone and then it displayed an error. Now it is stuck in iTunes recovery mode reboot loop. I am unable to switch it off or put it in DFU mode.
In the mean time itunes has stopped signing 6.1.2. Only option left is let itunes update it to 6.1.3, which looks very scary to me, as I may not be able to jailbreak it after 6.1.3 update.
I am seriously facing prospects of bricking my iphone. HELP HELP HELP!
Hacktivate! Use redsn0w to jailbreak your phone and it will be hacktivated.
answered 23 Mar '13, 15:43