Answer to: iPhone turns off as soon as I put the back cover on.Hi there, I've just solved such a problem on my iPhone 4. The key worked for me was to stick a transparent tape on the whole back of the back cover, but the little connector.This is being done so it prevents from closing any electrical circuits or so. This worked immediately for me. It got me though crazy for a while ... I hope this will help you. Btw, it is a great forum!