Corrupted Iphone 3 Gs n3.1.2

[velicator]

Hello I have a new Iphone 3Gs with 3.1.2 and I bought it a moth ago so it has the new bootloadern.

The problem is that the iphone is corrupted, and I want to restore but not update to 3.1.3

I donīt have the shsh-nummber.

How can I restore?
If I use Shift update and then select a custom firmware Itunes declines.

[Simtech]

You can't.

[koolcat]

Go create a custom firmware using pwnage tool. Create it and uncheck activate this phone and also uncheck cydia installer. After u finish creating the custom firmware, put your 3gs into RECOVERY mode by holding the power + home button until the phone turn off by itself then release the power button but continue holding the home button. Now you can plug it into the itunes and do shift restore and choose the custom firmware just made. After tat use blackra1n to jailbreak and unlock if needed

Hope that helps if not go look and find one of my post i did a month b4 it has step by step if the instructions above is not clear to u.

[Simtech]

The new bootrom's won't accept custom firmwares.... (am I right?)

[velicator]

The new bootrom's won't accept custom firmwares.... (am I right?)

But can you factory restore an Iphone with a Computer, and without I tunes.

And if you make a custom firmware with pwange tools, apple wonīt approve it to their sever, unless itīs 3.1.3 without any modifications.