If the SIM was working fine previously, this is unlikely, but it happens.
Here is a detailed breakdown of why this happens and how to fix it.
If you have cleaned the SIM, restarted the phone, and tested the SIM in another device, and you are still seeing the error:
The root of the problem usually falls into one of three categories:
Outdated software or carrier settings can cause connection failures. On Apple devices, go to Settings > General > About to check for carrier updates. On Android, check Settings > System > Software Update . Physical Troubleshooting
Report prepared for general troubleshooting. Device-specific steps may vary slightly by model and OS version.
If the software fixes fail, the issue is likely physical.
If the SIM was working fine previously, this is unlikely, but it happens.
Here is a detailed breakdown of why this happens and how to fix it. why is my phone saying invalid sim
If you have cleaned the SIM, restarted the phone, and tested the SIM in another device, and you are still seeing the error: If the SIM was working fine previously, this
The root of the problem usually falls into one of three categories: On Apple devices, go to Settings > General
Outdated software or carrier settings can cause connection failures. On Apple devices, go to Settings > General > About to check for carrier updates. On Android, check Settings > System > Software Update . Physical Troubleshooting
Report prepared for general troubleshooting. Device-specific steps may vary slightly by model and OS version.
If the software fixes fail, the issue is likely physical.