Hi, I've had this phone for a few months now with no problems. All of a sudden, every other day or so it has started to play up. The screen flashes on and off (slowly) and then the phone just switches itself off. To get it working again, I have to remove the battery and then it can be switched on again, only for the problem to repeat. As I say, it is only every other day or so that it does this. Has anyone else had experience of this or do you know if it is likely to be a hardware fault or a software fault? Thanks