My Droid Razr Maxx had stopped functioning and was stuck in a boot loop. I tried connecting it to the computer and doing a fastboot but all that resulted in was a black screen saying flash failure. I asked for a replacement which has come in, but now I am wondering whether they will accept the phone back or make me pay, saying I tampered with the software or something. If this is going to be an issue, how can I fix the phone and get it out of flash failure? My Droid Razr Maxx had the most current operating system.