If there’s dust and debris inside the SIM card slot, gently blowing some air into it can dislodge any dust and debris that’s getting in the way. To fix the error, turn off your phone and remove the SIM card tray from your device, then wipe the SIM card down with a dry, clean cloth. This can happen for different reasons including damage to your device, but if you haven’t dropped your phone recently then chances are that it’s just some dust from your pocket. If and when your phone displays a “SIM card registration failed” message, it means that your phone isn’t able to successfully read the data it needs from the SIM card to communicate with our mobile network. Is your phone showing you a “SIM card registration failed” error? Don’t worry, it’s not the end of the world – here’s how to fix it and get your phone up and running again.
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