Why Does My Phone Say Invalid Sim -

Are you using a or an eSIM , and did this error start after a specific event like a software update or dropping the phone ?

Seek technician or carrier store assistance if: why does my phone say invalid sim

: Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. Are you using a or an eSIM ,

If this error appeared immediately after a software update, it might be a bug. why does my phone say invalid sim

: If you recently switched carriers, your phone might still be locked to your previous provider.