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The scan gauge Robert has is a genuine 'Volvo System Tester' which is specific to the cars from that era.

VOL FCR iLexa which is a computer based program will work only computer based so requires a laptop and cable in the car

The only other option is an old Android phone, the Google-Play 850 OBDII app and the correct Bluetooth dongle. Not all dongles will work and it's getting difficult to find one compatible with the 850.

Here is a link to a Bluetooth dongle that will work with the 850, the vendor is UK based so unsure if he ships to the States Click

I don't know how the tune is loaded, I would think the car's ECU is connected to a laptop and downloaded directly. Speak to Vast and they will confirm
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