Ok so here's the deal for me atleast. When out of range it gives you a notification that you are of range and Gear S will switch to its number. This is confirmed by going into your call settings on the Gear S. Look under calls. When connected to bluetooth it will have your device number, however when out of range it will switch to your GS number. I also texted my nephew and he confirmed my Gear S number.
Also I don't know how long it take to set up the call forwarding but it took like 2 - 3 mins for me for it to connect properly. This is present by a phone icon with a circle on the home screen. When the circle is complete it will let you know call forwarding is ready. I did get my text forwarded to me as well along with any notification. So until we go more feedback I have to report my test on standalone setup. But end of the day this thing rock. I mean the speaker is great. Talked to my nephew with 0 issues. Battery is a concern though. I will have to full charge and see what happens. I been on it extensively and only charged up to 60% but it's already half of that.
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