Nokia 6100 phone w/ AD-5B adaptor works OK with BH-600 BT headset

as stated in the subject line, these three devices are compatible with
each other.

Its a trick to get them communicating with each other the first time,
the pairing process was a bit challenging.

The key point was that in order to put the BH-600 into "discoverable"
mode, you need to press and hold the multi-function button for about 5
sec from the power OFF state. I was always attempting this from the
power ON state and the result was that the BH-600 would simply turn
itself off.

Of course, the security code to complete the pairing is "0000#" as
stated in the directions.

hope somebody else can find this info helpful