My mom decided that she wanted to do the update on her Optimus M using the update tool. For some reason she said the update basically stopped at 95%. It was stuck like that for hours. Now her phone has a white screen and she can't do anything with it. She said that she received a message, probably on the computer, saying "usb modem fail". How can I help her fix this since she can't afford to buy a new phone at the moment? if she goes to a metro store, can they fix it?