Sorry did I have to write in English. Sorry :-) Please Notice that the pairing is not done in the phone "Settings"! One has to download and install the miCoach Train & Run app from App Store or Google Play. Then the pairing Should be Performed in the app. It is like this, Because there is no other way to "write" your personal data (age, height, personalized zones and so on) Onto the FIT SMART. There has been firmware updates to the SMART FIT, more functions to be added :-) The best thing is, no more heart rate strap!