You could pair your Phonak Hearing Aid with Avantree Bluetooth transmitters via Bluetooth. Please follow the steps like this:
Step 1. Disconnect Phonak from Other devices - Turn off Bluetooth on your cellphone and ANY other devices you have used with the Phonak Hearing Aids via Bluetooth before.
Step 2. Get the Avantree Bluetooth transmitter into Pairing mode.
Step 3. Get your Phonak into Pairing mode- Turn OFF and ON the Phonak Hearing Aids. (It will go into the pairing mode for 3min)
Step 4. Connected Successfully - Keep them within distance, wait for them to pair and connect