I am have an Apple 6S plus and have been having trouble with service dropping intermittently. There does not seem to be any pattern of where it occurs or when. It has happened to my phone while i was riding with other Verizon users who experienced no issues. It happened today within a mile of my home while speaking to another Verizon moble user. Usually, I have to restart the phone to restore service, but occasionally, it will return on its own. When I asked a tech at the local Verizon store, he switched out the Sim card, but that did not help. Any ideas?