How to query the travel track through SMS 202 1

Let's go to other places. In some places, you may need to show travel itinerary to see if you have passed through the risk area. At ordinary times, we will use the "travel itinerary" of WeChat applet to view and display it. But sometimes travel itinerary is prone to service problems such as network errors. If you are in a hurry to check the itinerary, you will delay things. At this time, you can try to check your trajectory through SMS.

How to check the itinerary with a mobile phone If you want to check the itinerary with a mobile phone short message, edit the short message "CXMYD" (need to be capitalized) to the operator number, and then you will receive a "second confirmation" short message, and send the last four digits of the real-name registration system ID number corresponding to the mobile phone number to receive the itinerary information. Generally, you can check the information in the last 15-30 days. Suitable for network error, bad network signal and so on. In addition, you can also check the itinerary through the "the State Council client epidemic prevention itinerary card" WeChat applet.

Operator numbers: Telecom sends "100 1", Mobile sends "10086" and Unicom sends "100/0".

There is a charge for sending text messages to check ballistics. There should be no charge. Judging from the content of short messages, it is a public service for all communication operators to send short messages to inquire about personal action tracks, which is generally free. Therefore, if the phone is in arrears or disconnected, you can also send a text message to check the action track.

According to the communication protocol, when each mobile phone user uses the communication service, the mobile phone terminal needs to always connect to the base station to verify the user's identity (code number information), so as to realize communication routing and connection. From this point of view, the location of the base station can be regarded as a coordinate anchor point, which can not only help the mobile phone users know their location, but also help the Beidou navigation system to improve the accuracy of location service. According to the three-point positioning method, we should be able to know more specific locations, such as a community and a street.

The logic of SMS query and location is to use the base station connected to each terminal to query the management area behind it. If the geographical locations are similar and the identification codes behind the base stations have the same possibility, the displayed locations may be different. However, the possibility of technical errors is very small.