Can I upgrade my iphone 3gs [3.1.3] to 4.0.1

[anwarica]

Hi everyone,

I have an iphone 3gs on firmware 3.1.3 jailbroken with spirit.
the modem firmware is 05.12.01 ... i dont know if that makes it new or old bootrom
anyway i wanted to know if i could upgrade it to a jailbroken 4.0.1 firmware

thanks in advance

[cdavid108]

I'm in the exact same boat with my 3gs. Same modem firmware and 3.13. Can someone please answer? I'd really appreciate it too!

Thanks!

[cdavid108]

Up... Anyone?

[L00i3]

As far as what I have seen, you can not upgrade a Spirit jailbroken phone to a pre-jailbroken firmware. If you want to stay jailbroken, just leave your phone alone until a new Spirit or other jailbreak solution is released for 4.0/4.0.1