i noticed that if you press certain keys during certain situations, it makes the brightness go to full, even if you have it on the medium setting in the display settings. For example, when i tap the power button and i'm on the medium brightness display setting, the screen will go to full brightness and will continue to stay that way until i don't touch the phone for a little while, and then the backlight will dim again to the medium brightness setting. also, let's say i have the keypad locked, and i am on the medium brightness display setting. now, if i were to tap the #9 button a couple of times, the screen will go up to full brightness and then stay that way until i leave the phone alone for a little while and then the backlight dims to medium, and then if i leave it alone long enough it'll dim all the way (this is essentially the same effect as tapping the power button, which i mentioned earlier). help?