Hi, I have a zebpad 7c tablet running android 4.0.4. Tab heats up fast and charging doesn't last long (I got it for free from friend). I want to use this tab for experiment. try and build my own os(TRYing!). But I need a clean slate to start with. I don't want to do factory reset or delete any app I want to delete the entire android os.... Delete the ENTIRE ANDROID OS IT SELF...Any help???