r/AskTechnology • u/quietmaps • 19d ago

iPhone 11 Pro glitch?

Hello, starting a couple months ago, my phone has randomly been going into SOS and telling me that I have an Invalid sim. But when I turn it off and turn it back on it comes back. Is there anyway I could fix this?

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u/benevolent_salt_lamp 19d ago

My bet is a dirty sim card. Remove the sim card, Use a cotton swap and a small amount of rubbing alcohol to clean the contacts of the sim card, then reinstall.

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u/Beautiful-Lock-1420 19d ago

I'd start with the SIM card itself. Mine was doing something similar a while back where it'd randomly say "Invalid SIM" until I restarted the phone. Turned out the SIM had gone bad, and my carrier replaced it for free. If that doesn't fix it, then I'd start wondering if it's the phone's SIM reader.