How does the communication travel card measure the travel? If I don't make a phone call and only open the traffic without Wi-Fi, can I find it? Why is there a problem?

The communication travel card uses the "signaling data" of the mobile phone to obtain the location information of the user through the location of the base station where the user's mobile phone is located. By using the communication between the mobile phone and the base station, because the mobile phone moves to any place randomly, as long as it can communicate with the base station, data interaction can be carried out.

Every time a mobile phone enters a new location area, it will initiate a location update to tell the network that I have arrived at a new place. Operators can know which cities and regions you have been to as long as they record the location areas you have passed in history. It has nothing to do with traffic and WIFI.

Related information:

If the travel itinerary code is accurate enough to stay in a province or city for more than 4 hours, it will be recorded. You can stay in China for 4 hours 14 days before the inquiry, and have been to other countries' cities without filling in the information. The query is initiated by the user.

You can use mobile phone software (WeChat, Alipay, etc. ) scan the code to enter the query page, or the WeChat applet can search the communication itinerary card to enter the applet, enter the mobile phone number and click to get the verification code. After successful verification, click Query to return the query result.