I have a Galaxy s3 is my phone compatible

You have Bluetooth, so it'll communicate with your phone or any portable bluetooth Android tablet or phone.

Can it reset the error code?

Yes. If the same code appears again, have the vehicle checked out.

does work with gmc supurban 2002

It should work on any car, or light truck sold in the US after 1996. I used it on a 2001 Ford Focus.

Is there a proper way to connect and disconnect the device from the port? Engine on or off?

Seems to make no difference. I hook up mine with the engine off or on. When I watch the smog guys hook up, they usually do when the engine in on. Hope this helps

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🚀 Unlock Your Car's Secrets with FosealWifi!

SEAMLESS CONNECTIVITY - Connect in just 10 seconds for instant insights.
EMPOWER YOUR DIY SPIRIT - Take control of your car's health and save on costly diagnostics!
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BROAD VEHICLE COMPATIBILITY - Works with a wide range of OBDII vehicles.

The FosealWifi OBD2 Scanner is a versatile diagnostic tool compatible with both iOS and Android devices, designed to empower car owners to troubleshoot engine codes and monitor real-time sensor data. With support for a wide range of OBDII vehicles and a user-friendly interface, this scanner is perfect for DIY enthusiasts looking to save on repair costs while ensuring their vehicle runs smoothly.

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