I am currently having issues with my 5c. A few days ago it lost signal and was constantly looking for service. I updated it and followed all the fixes posted on the apple support website and now it constantly shows No Sim Card. I took my sim card out and put it in my friends IPhone and it works fine. I also put my friends sim card into my phone and it still said No Sim Card. I am assuming the issue is with the phone itself and not the sim card. Anyone have any ideas on how I can fix this?