Hello - I'll try and keep this short before you die of boredom reading a massive wall of text. I have a iPhone 3GS (iOS 4.0.0) I Jailbroke it successfully last night using Comexs JB (Thanks) all was well until I tried to Unlock it through ultrasn0w on Cydia, it unlocked and my SIM card was accepted but I had no signal bars...(they was there but I had no signal) I tried everything I saw on the web until I finally decided to restore my iPhone to factory settings and try again. Heres when I got my problem, when the phone rebooted the apple logo comes on and the spinning thing and the dead pixels along the top of my screen (normal when jailbroke) but thats it?!?! After about 5 secs the spinning thing stops spinning and nothing happens I've tried to put it in DFU and recovery mode but both don't work its like the phone has crashed. - I can still turn the phone on and off. I'm really stuck and ideas ideas are appreciated please Thanks.