mobile

im looking to purchase a gear s unlocked brand new but everywhere i go to finda a demo or more info i cannot find one where i live even the staff are clueless even the ones working in the samsung store.

my questions are

1. if i put my phone sim into my gear s what functions can it do similarly on my phone if say i go for a walk without my phone? will whatsapp work?

2. does the gear s need to have your phone connected to the internet at home if you leave it there and go out for the day for full functionality? i read in order for gear manager to function the phone needs to be on and connected to a working connection (obviously the gear s will have my sim in it o i assume calls etc i'll receive via the watch)

3. is the watch truly stand alone for calls texts whatsapp etc if i just put my phone sim in it and go out for the night?

my ideal scenario is if i want to go out for the night and dont want to bring my phone wih me im hoping i can receive calls texts and whatsapp only by just having my phone sim in the watch. is this doable? or does my phone need to be connected in some way?

thanks