So i bought a 16gb 3.1.2 jailbroken iphone today but the phone was not getting a wifi connection at all even when i went to the reset network settings. So i decided to downgrade back to 3.0, so i went to itunes hit shift restore to a 3.0 firmware, it started then it stopped with a message saying "cannot restore". Now the phone is stuck on the itunes logo with the usb cable. Any ideas on what i should do here? Please tell me that there is a solution and that i didnt mess this thing up.