iphone 3gs stuck in dfu loop - tried everything
I wanted to update to 4.0 from 3.1.2 so tried doing it with redsnow and a custom firmware that i got of some torrent. After the custom firmware update, my phone is stuck in dfu mode and TinyUmbrella, Recboot or iRecovery can't kick it out. I'm getting a totally black screen.
I used official 4.1.2 firmware through redsnow to boot theathered...the phone starts to the unlock screen but is not activated so it asks me for a valid SIM which i cannot get. Also after a while the phone goes back to dfu loop mode. The battery is charged.
What should i do? Do i upgrade to 4.2? I have these specifications
SHSH: only for 4.2.1
Please help :(