When the mobile phone is turned off, the travel card will not be recorded, because the location record of the travel card is based on real-time travel and cannot be located after the phone is turned off.
Travel code is the code of communication big data travel card, which is also equivalent to health code. China Institute of Information and Communication, together with China Telecom, China Mobile and China Unicom, used mobile phones to receive data, which was obtained through the location of the base station where the users' mobile phones were located, providing free inquiry service for the 654.38+06 billion mobile phone users nationwide.