This operation is actually a way to facilitate those users who have not gone through the account opening procedures in the telecom company to buy telecom mobile phone cards at dealers or agents and return the user information to the telecom company for real-name registration.
Simply put, when purchasing a telecom mobile phone card, users don't have to go to the telecom business hall to open the card registration formalities, but tell their own information to the agent or seller who sells the telecom mobile phone card.
Then the agent or seller will file the number you want to buy and the user information of the user back to Telecom via SMS, and ask Telecom to input the information of the mobile phone card and the user before allowing the dealer to sell the mobile phone card to customers for normal use.
In fact, the file-returning operation is that the agent helps the telecom company to complete the real-name registration of new users through SMS and other means.
Extended data
There is no customer's identity information and mobile phone card information in the database. Only after the information is reversed can the relevant package business be opened for customers.
When you do a card, you just enter the card into the system, but you don't really put the data in. This is a problem in the telecommunications system, which can be understood as recording data when handling the card, and filing back is to confirm the submission of data.
If the data is not returned to the file, you can use it if it is available. If it is suddenly unavailable or individual functions are unavailable, that is why data is not returned. The system is not written to death, even the law has loopholes. In some cases, the mobile phone card does not need to return documents.