Please do not try to slap or hit your phone to try and fix it yourself.. It did not work for me and it did not return to normal even after a week. I suggest finding an iPhone repair shop (not apple, they will charge you $100+ to replace) and have them replace the camera instead as the hitting/slapping will for sure damage the inside of the phone if done repeatedly. The place I went to charged me $25 for the rear facing camera and it works perfectly!