i recently bought an 8GB iPhone, i was running on a 1.0.2 version i updated lately to 1.1.1 and everything goes fine until a new 1.1.2 version released and i tried to update then everything went wrong i couldn't jailbreak and unlock, then i downgraded to 1.1.1 using restore mod but when i jailbreak (i go to www.jailbreakme.com and do the work) after the jailbreak done the iPhone reboot but never comes back! i tried iPhuc and iBricker to boot it but with no success

any ideas ?

reconnect it to your computer and then click restore to factory settings. im 90% sure that it will fix even bricked iphones.