I have been having se issues. Only on the 5 and 5s models. 5c has yet to be a problem. After looking real closely there is a piece of tape on the top left and under the tape there is another layer with like an alluminium layer under that. Transfered all 3 layers over to new screen and seems to be working. It would be right above the rear facing camera. Had to look real close to find it and be super careful transfering it over. The allum is super thin