I often find that my LG G3 is turned-on when not in use by itself. It often may be caused by the back button touching the case or when laying flat on the ground but sometimes it just turns-on. Strange. Not happy with the back buttons; there is a reason all others use side or top buttons. Speaker on the back is not great either when the phone is flat down. Where is the mike; does the speaker double as the mike? Thanks.