I'm going to the store today to exchange the power adapter for my 3G. Do I have to make an appointment to get my phone checked out? It's doing two things that are weird. Maybe you guys can help me with one-- I'm having a dimming issue. I have turned down the brightness on my phone a little to save some battery life. If I turn it down too far, in some lighting conditions the backlight never comes on. I have to go to brighter light before it will turn on. I have it around 1/4 from the left. Any further left and the backlight won't turn on. Also, when I'm playing a game, the screen won't stay lit-- it'll dim while the game is being played. Is this how the phone is made or is something wrong with mine?