The itinerary code will be displayed if you stay for more than 4 hours.

"Communication big data itinerary card" service uses the base station data, in order to ensure continuous communication, to realize the coverage of the blind spot, the administrative division of the junction of the two places of the base station signal may be cross-coverage, resulting in the results of the deviation.

Additionally, a stay of less than 4 hours in a city will not be recorded. For overseas trips, you will need to enable international roaming while you are abroad.