How does Telecom check the last four digits of ID card?

Telecom's method for inquiring the last four digits of the ID card is as follows:

1. First of all, using the mobile phone number query, telecom users can query the last four digits of the ID card associated with the mobile phone number through the operator official website, the mobile phone APP or sending short messages.

2. Secondly, the real-name authentication information query, the telecom user has completed the real-name authentication and bound the ID card information with the mobile phone number, so the real-name authentication can be carried out through the operator's store, customer service phone or network platform and the relevant ID card information can be obtained.

3. Finally, the public security department channels inquiries. In some cases, telecom users need to inquire the name and ID information associated with the telecom card through the channels of the public security department.