How to pair an LH370 headset to a Panasonic KX-TGF 370 phone via Bluetooth
1) Put headset into Bluetooth pairing mode
2) On the phone’s handset, press MENU then #621
3) You may need to enter a pin, so just put 0000, then press OK
4) After a time, it should say that it is successful and ready to go
Note: this may also work for other Bluetooth desk phones, as well!