I've had this phone for about 3-4 years now, and in the last 6 months, it turns itself off with no reason 2-3 times a day. If I don't have my earpiece in, I don't know it until I go to use the phone. It happens with any kind of charge, so that isn't it. In order to restart, I have to remove the back of the phone and remove the battery to reset. The confusing thing is that the light flashes at the top as if it's on. It is VERY frustrating! Any thoughts?