the phones two top buttons operate with very delicate metal tabs underneath the plastic buttons. they can become easily detached. if you have an existing warranty, look into a replacement device. if not, there are places on the internet where you may be able to either buy the replacement top piece with the buttons, or the thing metal parts attached to the mid plate. you just need to diagnose the issue after disassembly in order to rectify it. take the phone apart to see where the problem is. either in the outside buttons on the bezel or the internal buttons.