pulled directly off of BlueAnt website figured it was usefull for some people
Using the Z9 with blackberry handsets
many recent model blackberry handsets have their own DSP however when using the Z9, BlueAnt recommends adjusting the DSP under the Z9 bluetooth device settings.
This will ensure that only the Z9 DSP is in use when the Z9 is connected.
to do this, please follow the following instructions;
1. Whilst the Z9 is connected to the handset, enter the bluetooth setup menu and scroll down to the 'BlueAntZ9' device.
2. Whilst 'BlueAntZ9' is highlighted, click the menu options button and select 'device properties'.
3. Scroll down to 'echo control' and set to the off position
4. In this same screen, some blackberry handsets also have an item called 'automatic volume control'. if this is present, please also set it to the off position.
5.Save the settings and you are right to go
for further assistance, please contact blueant technical support on (886)891-3032
or go here BlueAnt Z9
or BlueAnt Wireless Global - the latest Bluetooth and wireless technologies available