You have to check, if FP1’s supported Bluetooth profiles match the ones that the headset requires. If not, you might have a chance that the next software update will include the missing profiles.
Edit: FP1 supports the QC35:
Can QuietComfort® 35 wireless headphones take calls?
Yes. QuietComfort 35 headphones have a dual-microphone system to allow you to use them during calls when connected to a smartphone that supports the Bluetooth HFP profile.
Edit2: Are you sure that telephone audio is activated in the phone’s Bluetooth settings?
