Can’t call my own number and no one can call me

Hey there,

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

janel214 Said:

"Can’t call my own number and can’t call my cell from another phone "

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Troubleshooting Dropping Calls:

A. Install a Cellular Update:

It might be prompting you for a cellular update to install. So, go here for that. Update your Carrier Settings Manually on your iPhone or iPad - Apple Support

Also...

B. "No Service":

Is "No Service" shown on the top-left corner of your screen? If so, go here to fix that: If you See No Service or Searching on your iPhone or iPad - Apple Support