I jailbroke my iphone 4 with tethered jailbreak up dated 5.0.1 back in november i believe which worked fine I didnt mind rebooting. then sometime after christmas I untethered with corona. no problems. in october i canceled my att account i still used the iphone for internet and all of its jailbreaking features such as apps and ect. about a month ago i updated cydia. Cydia said updateds were required I updated and during the update process the phone would not reboot and got stuck on blinking apple logo. I have tried to rejailbreak update with itunes I get errors, phone got stuck in recovery mode. I downloaded tiny umbrella i believe i am getting phone in dfu mode. when i try and rejailbreak i have tried all options I select the custom ipsw i tried tether it exploits, stage 1 goes throough and stage two it never reboots. can someone please help me.