When connecting the Bluetooth on our Units, your 

Smartphone will ask for a password pin to connect

Check if the Pin is correct 

The Default Pin is 0000

If you did put the correct password - Maybe the settings on the Unit is not Correct

try the next steps below \


we can also check the settings to see if it is on the correct

Bluetooth Module

should be Wenqian BC6

or WQBC6 

something along those lines



System Vers/info (7890)

System Settings

Scroll down to Bluetooth Module