Hi @ all,
I want to talk about my experiences with the Nokia 5. I guess that this will work for the Nokia 6 as well, because it has the same chipset.
The Nokia 5 has rSAP on board, but it don't transfer the phone book data. I don't understand why, but the app Bluetooth Phonebook V1.2.5 helps a lot here. In my case with my VW Passat CC (make year 2009), I needed to turn *off* the check box "Only with phone number", so that it would work.
With this cell phone in hands, I would say that HMD/Nokia is on a good way.