sorry for posting this in english. i have a t5355 that when it starts up is stuck just before the enter password to unlock the phone, the screen appears all black and will not respond to any touch. i have been looking all over for a way hard reset the phone but nothing seems to happen. i can get the phone to the "downloading...." screen but no drivers appear in windows i can also get the calibrating screenn to show up but it just sits there all night and nothing happens! and then there is another screen that shows "error step 3...the file is missing" i just need to know the button's to hard reset the phone. thank you.