Is SIM failure in my phone or the carrier network

lucinda52 wrote:

My phone is unable to receive or send messages or calls. The Internet is working fine.

Wifi Calling or Cellular calling...

If you can't make or receive calls on your iPhone - Apple Support

If your call fails or you can’t receive calls on your iPhone - Apple Support

If you can't connect to a cellular network or cellular data - Apple Support

If you see SOS, No Service, or Searching on your iPhone or iPad - Apple Support

Settings>General>Transfer or Reset iPhone>Reset>Reset Network Settings <—————————RESET

If you see SOS, No Service, or Searching on your iPhone or iPad - Apple Support

Temporarily, you will need to use another phone to contact your carrier and ask them to troubleshoot the connection from their network to your phone.