System: IOS15.4

Software Version: WeChat 8.0.22

How long does a cell phone shutdown trip code stay for more than 4 hours will be recorded. The trip card will not be recorded when the cell phone is turned off. Because the positioning record of the trip card is based on the real-time positioning of the trip, after the phone is turned off, it can not be positioned. It will take at least 4 hours after the phone is turned on for the trip code to have a trip, plus the trip code synchronization time is expected to be around 6 hours.

The trip code is the communication big data trip card a code is also equivalent to the health code, is by the China Academy of Information and Communication Technology in conjunction with China Telecom, China Mobile, China Unicom, three basic telecommunications enterprises to use the data received by the cell phone, through the user's cell phone is located in the location of the base station to obtain, for the country's 1.6 billion cell phone users to provide free query services.

All cell phones can be located through base stations, the principle is to use the base station to determine the location of the phone's distance measurement. The accuracy of this positioning method is very dependent on the distribution of base stations and the size of the coverage area, the more base stations around, the higher the accuracy of the positioning effect.