Why can't I make or receive a phone call?

[Jennifer45]

Not making phone calls.

[vzw_customer_support]

We definitely want you to be able to complete your calls! How long has this been occurring? What happens when you attempt to make a call?
YosefT_VZW
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[tekgagnon]

within the last couple of hours.  I experienced this, then looked up the contact and was able to make a call.  After that, I was unable to make or receive calls.  Texting works, all other functions seem to work.  I rebooted it and still no luck.  Checked airplane mode, other possibilities.  No updates available.