inCarDoc Download link: inCarDoc - OBD2 ELM327 Scanner - Google Play 

Step1:
Press the vLinker MC+ Bluetooth button, then open your phone's Bluetooth Settings, search for and tap "vLinker MC-Android".






Step2:
A request pairing prompt will be generated when pairing, enter the pairing code "1234" and click "OK".







Step3:
Successfully paired to the Bluetooth device "vLinker MC-Android".







Step4:
Click on "Settings".






Step5:
Click on "Connection".







Step6:
Click on "Connection mode".







Step7:
Select "Bluetooth" as the connection method. 







Step8:
Click on "BT connection"







Step9:
Select the paired Bluetooth device "vLinker MC-Android".







Step10:
Return to the home page when the settings are complete.







Step11:
Click on "Connect <BT "vLinker MC-Android">".






Step12:
Connected successfully.