all of a sudden sometimes when i go into camera mode either front or back camera, the screen looks real grainy and has lines in it, like something inside is all messed up. i close the app and reopen and its still there. i take a pic thinking its just the screen or an effect and its on the pic too. the screen looks fine without camera on. i have to reset the phone in order for it to clear up. any thoughts or should i call sprint and say gimme a new phone?