I pulled off my battery while my xperia arc s was taking too long to shut down... since then it has been in a rebooting loop, i tried using pc companion to repair the firmware but it keeps saying "There is no update available for your device", then i tried flashing it with emma flash tool and it says the phone is locked... I dont how to unlock the phone with it not coming up at all.... I'm new to this, plss help me out...