Carista Download link: Carista OBD2 - 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:
Click on:"Connect".





Step5:
Click the OBD2 adapter "vLinker MC+".





Step6:
Select the OBD2 device "vLinker FS XXXXX".





Step7:
Waiting for the device to connect to the vehicle.





Step8:
Connected successfully.