A week ago, the buttons of my phone were acting weird. When i press the left selection key it responds with call key, right selection key responds with cancel key, up navigation key with down nav key and left nav key with right nav button. All other keys worked well. I switched off the phone for a week only to switch on and find the phone is normal again. I was wondering what the problem was or will it return again? NB: its outer body is a mess-Broken