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 \
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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
Check
Settings
System Vers/info (7890)
System Settings
Scroll down to Bluetooth Module