Not sure what's going on but the past month or so, my iPhone 6 has sporadically failed to recognize the SIM. Ejecting the SIM and pushing it back in fixes it the first or second time, but this keeps happening which is worrisome. Plus there isn't any pattern to when this occurs. Sometimes I'll come out to my car after work and I'll get this error, despite my phone not being touched all day. I've seen it happen when the phone was on my desk and not being used at all. It went from 3 bars to "No SIM." Or I could be using it, sitting down and all of a sudden this happens, so it's not the result of motion or anything. I'm baffled. Has anyone ever had an issue like this?