I recently upgraded my jailbroken iPhone to version 2.0 using the Pwnage tool. It worked perfectly fine. Today I couldn't sync my phone using iTunes and it also had lots of crap on it, so I reset it using the built in option under settings (not iTunes). A warning came saying all data etc will be deleted and it will take about an hour to reset. Now, I can't start my phone. The apple logo comes with the circling dots and that's about it. Even iTunes doesn't see it connected to USB.
I would appreciate if someone can hint the problem and/or how I can fix this.
To fix it you'll have to place the phone into DFU mode and restore.
How:
1. Itunes running, phone plugged in. Turn phone off (hold home/power to force off)
2. Hold down power button 5 seconds.
3. WITHOUT letting go of power, now hold down home button for 10 secs.
4. Let go of power button, still holding home button for another 10-25 secs or until Itunes now recognizes the phone and will let you restore.