I just tried the pHAT on an RPi 3, but rather than adding a new HCI device, it completely stops the old one from starting.
I've updated the EEPROM, and have a clean Raspbian build with all the latest updates.
Should this work?
I am also looking for this answer. See my post: Raspberry Pi 3 Compatibility With RedBear IoT pHAT
@darkcmder - I saw your post, but that seemed to be concerned with WLAN, not Bluetooth?
@marcosscriven - I thought it was a similar issue with the Bluetooth as well. I'll fire mine up and down a few times tonight and confirm tomorrow.