I can't take phone calls on my Frontier, and I can't call out. What happened?

[AC Question]

This just started. The Frontier has worked perfectly since early January. I've tried everything, and checked all settings. What have I done wrong? The watch is paired to an LG G4, and,it is not an LTE.

 

[B. Diddy]

Moved to the Gear S3 forum.