A:Answeryes, if you leave it with the factory settings. Changing the face setup requires a high $ level Samsung Android, or an Apple. Then, you can go back to your Android J7.
A:AnswerYes. They are in the stores now with more being shipped. The Charger 3 was suppose to come out some time in November but they moved up the release date to the end of October.
A:Answerif by "S" you mean the Charge 3 Special, then the Special (1) has Fitbit pay like Apple pay and can be used, by itself, to make purchase where NFC is allowed and (2) it comes with an additional sport band