What causes SIM card not to work for phone calls?
What causes SIM card not to function for phone
iPhone SE, iOS 16
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If you have followed all the steps and instructions in Related Article: If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad and if you still need help, get more help and assistant from Apple directly, see Contact Apple for support and service -> Contact Apple for support and service – Apple Support (UK)