I have an older ZTE Z990G that I just use for playing tunes around the yard on a bluetooth and headsets.

SOURCE: connecting bluetooth headset

You have to go through a process to pair the devices.

Firstly:
Make sure bluetooth is turned on on your laptop (varies for each model)
Make sure the headset is fully charged.

With the headset power off, press and hold
the Call button for 6 to 10 seconds until the
blue indicator light turns on and remains
steadily lit.

Then goto the bluetooth control panel and select "Look for Devices" or similar. Wait until the device has been found and when it asks for a passkey, enter 0000 and press okay.

see some more info at: http://tinyurl.com/2bz7hc

SOURCE: Problem Pairing Blackberry 8700 w/ BlueAnt Z9 Bluetooth Headset

This problem has been solved by turning on the blue ant system then holding down the vol - and vol + buttons simultaneously for 5 secs.

SOURCE: Motorola S805 headset worked fine with T60 laptop

Solution I found with the same devices is to properly par the devices.

Refer http://direct.motorola.com/ens/s805/QuickstartGuide.pdf

It basically states :

1.Ensure the headphones are turned off (L indicator light not blinking).
2.Press and hold L button. After about 6 seconds, the L indicator light becomes steadily lit.
3.Release the L button. The L indicator light remains steadily lit.

If the L indicator light is flashing or not steadily lit, repeat steps 1 through 3

Now on the T60:

Search for Bluetooth Devices as you would normally.
The T60 lists Bluetooth devices it finds.
Select Motorola S805.
Select OK or Yes to pair your headphones
with your phone.
Enter the passkey: 0000
Select OK.
When your headphones successfully pair
with your phone, the L indicator light
changes from steadily lit to rapidly flashing.

That's it next time you start a audio program on T60 output will be sent to Motorola Headphones

SOURCE: I just recently bought my XTM-1200 Bluetooth

i bought xtrem head phone bluetooth my netbook is aspire one d257
the sound is not good robotic sound is coming please help thanks

SOURCE: unlock zte z990g

Press emergency call in idle mode .Press *983*987#.This will go to factory reset interface.you can reset your handset to default.