Hello, My S Beam and NFC are not working at all. Id tap the back of the phone with my girlfriends and nothing would happen. Both switches are turned on on hers and mine. I have no clue whats wrong. Shes running an S3 and I have an S4 but I think its my phone thats the problem. I just got it about a week ago from a guy i found on CL. It was originally an AT&T but he supposedly unlocked it and im now using it for Metro PCS. I have the SGH - 1337 model. Its unrooted. Any one know the answer???