As some of the previous speakers, I had problems with the satellite reception of the car kit, if I wanted the NAVIGON software use (for T-Mobile customers free of charge). The car kit tool was not very fast a sufficient number of satellites, but the NAVIGON app. However, other speakers had also times no problems. The solution is quite simple: (Press the top right long and Abschaltfrage affirm) After installing the car kit tool, the iPhone completely off. Then start after a few seconds the new iPhone, PIN entry for SIM ...... Since coming to the start of the Navigon app very quickly into being a stable Sat Direction. Probably the iPhone stray previously always between the 2 drivers of Navigon and TomTom.
I hope all is helped with my review, the car kit is now working perfectly.