A:AnswerIt sinks to your phone not your network you don’t have to get a cellular model because it can work with your phone as long is its with you. Don’t let that stop you from getting it.
A:Answerabsolutely and it makes sense to have more than one band to fit your use of the watch. Something fancy for a party, something sporty for working out.
A:Answeryes it will work with the 6plus. If you only use gps and bluetooth there will be no extra charge, if you use cellular the charge depends on your carrier.
A:AnswerYes you can connect your apple Watch to your cellular network IF YOU BUT THE CELLULAR Apple Watch. It will have what they call number share and if your phone dies you will still receive texts calls and emails and facebook messages if you use facebook. Otherwise they offer the Bluetooth version Apple Watch that connect to bluetooth.