Download link:  AlfaOBD - Google Play 

Step1:
Press the vLinker FS Bluetooth button, then open your phone's Bluetooth Settings, search for and tap "vLinker FS XXXXX".





Step2:
A request pairing prompt will be generated when pairing, click on "Pair".





Step3:
Successfully paired to the Bluetooth device "vLinker FS XXXXX".





Step4:
Open the app and click on Bluetooth.





Step5:
Select the paired devices "vLinker FS XXXXX".





Step6:
Connected successfully.