Why Can't I Make or Receive Calls On My iPhone 7+?

Just started last night 8/14, I have 4-5 bars. Last night when I would call

it never rings out,  but this morning it rings 2-3 times a recording says

“welcome to Verizon wireless your call cannot be completed”…..my bill is

paid and when someone calls me it rings thru to voicemail.

On Tue, Aug 15, 2017 at 7:55 AM vzw_customer_support <

Google Alert – “iphone 7”