I have an Iphone 4s Game center loaded fine for awhile, but a week ago it stopped loading and games are saying im not signed in, but i am, when i click on gamecenter its just a plain white screen. and when i go into settings and click on it. the lil dial just goes around and round, Ive tried restarting the phone several times. It worked one time and gamecenter loaded fine for about a week, then all of a sudden it stopped loading again and ive restarted the phone again 5-6 times still just a blank white screen. Anyone know whats going on?? Thanks foir any help.