My phone was in my pocket and locked, there is not response when I press any keys, only when I plug the charger and when I take the charger out, the screen only comes on for a few seconds, when it also comes on for a few seconds. I dont know how to unlock it and I have tried the * and send key. This has happened before, but I dont remember how to unlock it.
I thought it was in standby mode, so i pressed the mute key but nothing happens, I have also done a few battery pulls and left the battery out for up to 15 mins.