The card will be updated after 14 days.

Communication big data itinerary card, by the China Institute of Information and Communications Technology in conjunction with China Telecom, China Mobile, China Unicom three basic telecommunications enterprises to use cell phone "signaling data", through the user's cell phone is located in the base station location to obtain, for the country's 1.6 billion cell phone users free of charge to provide the query service, the cell phone users can be used through the service, query I have been to all the cities in the first 14 days of the information.