Hi! I bought my SIM card around 2 weeks ago and I have had no issues with it until now. On random, my iPhone will say "No SIM card Installed" when my SIM card is in the tray. I have to remove the tray and put it back in again for it to work.
This keeps happening to me as well. I keep missing a bunch of important calls and they go straight to voicemail. I had one reply saying to toggle and turn on and off airplane mode, and that seems to work, but I was looking for something more long ter...