I tried to buy a Headset for my 3660, and it did not work!
I read all messages regarding BT headsets and found only hints for 3650, but I am not sure if this is the same as for 3660.
Summarizing I found, that:
1. I need to check that the Handset has "Support of Bluetooth HANDSFREE Profile" and not HEADSET Profile
2. That the firmware must be higher than 2.4 (How do I check this?)
3. Jabra may only usable if it is a new model (May 2004)
4. HDW-2 should work
5. HBH-60 should work
6. Does HS-4W work?
Thanks for thinking with me 😉