The Apple series3 watch has become independent of the iphone.
"Answer a call from your surfboard. Ask Siri to send a message. Take your favorite playlists for a run. And do it all while leaving your phone behind. Introducing Apple Watch Series 3 with cellular. Now you have the freedom to go with just your watch." From Apple promo email.
This development raises the what's possible level. Hello--hi--what up? I'm in the curl hanging ten--oops-- wipe out. Hello Siri--call 911--I'm on the floor and can't get up. Hello--what are you doing---hum--something of a private nature. Hello--I'm scuba diving. Evidently one can wear the Apple watch places where the iphone dare not go.