I was charging my Galaxy Nexus and realized it was not charging. I unplugged it and the cord was hot as hell. The mini-usb had a burnt smell to it. The USB port doesn't work anymore on the phone. The problem is that I need a replacement but my phone is rooted. I don't want to void my warranty so I need to unroot it and relock it. How do I do this without a USB? I have already tried adb wireless. The problem is that I lose connection when it reboots to the bootloader. Is there an app or way to do this all on my phone without a computer? Any help would be much appreciated!