3gs 3.1.2 is completely locked
would appreciate some help.
I just bought a 3gs 16gb with 3.1.2
A friend unlocked it and JB'ed it using a macintosh (blackrain+snow)
Used it for a couple of days (trying not to reboot). But now it is completely stuck and even blackrain does not help anymore, it hangs when you see the geohot screen on the iphone, then the iphone at somepoint reboots, and the whole thing starts over.
\Tried to restore to 3.1.2 - and it would say that I am not eligible.
Any help would be appreciated