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I downloaded the software, Torque (lite) from the android store, pluged it in and did a search for blue tooth device and it worked, about as easy as it gets. I keep mine plugged in at all times. It isn't just for error codes. If you mess with the program you will figure out how to add read outs on sensors that you never knew existed. It shows up in real time on your phone and can be read while driving. Not that you should, if you do then you may get an array of error messages telling you that you were so busy looking at your phone that you crashed. You can set up screens and read info such as voltage, throttle percentage, trip, timing adv, rpm, speed, mpg, air flow, coolant temp, 0-60 time, intake temp, cylinder state etc.