my phone randomly started always having a charging sign and when it gets to low battery it keeps popping up every few seconds that i have low battery. its like its charging and uncharging really fast but without anything connected, also i cant connect with kies it doesnt detect my phone at all and ive tried to reinstall kies and install the drivers but it stil wont work. i need to back up my phone so i can do a factory reset cause i dont want it rooted anymore