I have an optimus f3 from virgin mobile. I was using my phone like normal when all of a sudden it pops up and says home screen not reponding. I have done multiple factory resets and get the same thing. I am guessing it is my software and would like to reinstall. I have tried to use mobile support tool but my phone crashes before I can get it to connect to computer. I guess that leaves of the option of trying to install from my sd card but I can not seem to get it to work. I really need my phone working by morning if anyone is awake and can help!