Tested, it works. Great.
But, it will drain your Force battery.
So, if you are constantly charging your Force while at work or at home, then activate it, by all means.
However, for me, I decided not to turn it on since I have Pebble with me, which does the job better.
The FitBit Force call notification is wonky at times.
Sometimes, there is no notification whatsoever, nothing at all.
Before you could get the notification to work, you need to pair it again with the iPhone, which will have it listed as Charge, instead of Force.
Well, tested yours? Let’s share your experience in the comment section.