ale828 wrote:
Mga sirs i have a similar problem.
I have a iphone 3GS 32gb with software version 3.1.2, firmware 05.11.07 new bootrom
US model, AT&T
Jailbroken via blackrain and unlocked na.
I wanna upgrade to software version 3.1.3 or 4.0.1
How do i do it? The phone always goes to USB mode if i turn it off (tethered) and
i don't have the original AT&T sim for activation.
Can i use any AT&T sim? would the One sim work to activate the unit?
Open Cydia, check main page and look for something like this
"This device has SHSH on file for iPhone OS/iOS ......"
Check what SHSHs had been saved, you can restore to its corresponding firmware. Read posts above for more info.
In case you managed to save SHSH file, Before doing the shifT+restore,
DO THIS
MAke sure you have the ATT sim or one sim to activate device