I really hope your experience is better than mine, I found Bluetooth to be more than a little annoying & gave up.
Short battery life
Security is lacking
Software was tinkery & poorly written
My Bluetooth fantasy was ruined by my wife when I showed her how I could sync my phone to my computer & she said "But you're 2 feet away, you just spent $200 to syc from 2 feet away?"😱
Tried 2 bluetooth headsets, several USB adapters. Admittedly it was ~1 year ago, hopefully the technology has matured.
I am jealous of your 6820 though, I've had a 6800 for >1 year now & really lke it, it's the only phone I've replaced with the same model😀