hi guys.i am facing one problem with my W550i.i sent one screensaver from my pc to cell.dont know wat happened.cell got stuck.i removed the battery n then put it back in and tried to switch it on.but it wont start.it only comes up till the sony ericsson logo and stays like that.please somebody help with this.are thr ny codes for SE inorder to format the phone without turning it on.like,in nokia,thrs this procedure to hold three keys while starting up in order to format the entire phone.are there ny such procedures in SE.waiting for ur comments guys.thanks.