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I don't know if you experienced this with your X4 tuner Dom, but mine did some pretty weird stuff..
The first time I plugged in to get the strategy and serial # for Matt, I shut everything off, auto headlights, radio, closed all doors etc.. I plugged it in and my phone started dialing people, :doh:
When I got the tune I shut the phone sync off, the only weird thing that happened was my radio was reset, balance, fade base etc.. Matt told me this happens to him as well..
The tuner is a little buggy when it comes to the sync.. It's annoying that every time I plug in to datalog etc, I have to change everything back..
I did talk to SCT tech support and made them aware of my findings..