[WickedBMW]

Can someone please explain to me why some tuners lock car’s VIN number to a cable/tablet when they tune a car, and some don’t? In short, what’s the difference between OFT tablet which can be reused, and a cable that tuners provide, but cannot be used again because VIN is locked to that cable. Here’s an example. Let say I sold my 2013 M5 and bought a 2015 M5, I can reuse OFT on my 2015 again, but with cable tuning I cannot, and I need to buy new cable. How come?

Thank you