BBFM123 Said:
"IPhone 11 Dropping Calls: I have an updated iphone with the current software, restarted the VPN, have a new SIM card, restarted the network - carrier disconnect and reconnect the line - and I am still having calls constantly drop. Has anyone else had this happen with their iphone and what did you do? It is becoming a major problem with work phone calls."
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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