Data from smartphones allow to examine people of a given nationality staying in a foreign country. With the information about which language is set on the device, you can determine the nationality of the user. You can then analyze the demographic and behavioral profile of people who are in a given location. Thus, it is possible to study Poles who went to work to the British Isles, Ukrainians residing permanently in Poland, or sports fans from a given country at the world’s largest sports competitions. With the data from the mobile channel, we checked the profile of the Polish fan, who supported athletes at the Winter Olympic Games in Pyeongchang.