I've got an iphone 4 stucked in a loop. It shows the apple logo and after a feew seconds go black and restart with the apple logo again. It was working fine but afeter adding a filter to the proximity detector (just a plastic piece) it began with the endless loop. I tried to dismount and mount it again several times.
I've tried to restore from itunes (with shift+restore and simply restore) and i got an error with ipsw 7.0.4 and itunes stayswaiting if I try to "restore and update". I've tried to get it out of the loop with tinyumbrella (fix recovery) but when it restarts the screen shows:
"Unable to find gBdevList
Unable to find fs_mount
Unable to find fs_unmount
Unable to find fs_load _file
I've tried redsn0w too, but no response. I've tried this video:http://www.iphonehacks.com/2013/02/fix-endless-reboot-loop-problem-jailbroken-iphone-ipad-ipod-touch.html