I recently upgraded to ios6 and jailbroke it with the tethered jailbreak. It was working fine up until I dled a zepelin from Cydia. Once I installed that and restarted Cydia, my phone turned off and got stuck on the apple sign while it was booting. It didn't change and I eventually did a restart on my phone and once I restarted it it didn't have my jailbreak anymore. It usually would ask for a respring and would go into safe mode, but it didn't go into safe mode. I tried boot tethered on red snow, entering DFU mode. I entered DFU mode and booted my phone again and once I did that it gets stuck on the apple logo again. I had to restart my phone holding the lock and home button again and once again there's no jailbreak on my phone. I can't open cydia,installous or any apps that I had downloaded along with winterboard. Anyone else experience this issue or ever have this happen to them? What should I do?