What is the reason why Unicom handles the calling card and shows that the ID card is a red list?

Because the holder of the ID number has a bad record of arrears, taxes, violations of laws and regulations, or the ID information has been stolen. Unicom needs real-name authentication to handle calling cards. If the ID card information is included in the red list, it will not pass the real-name authentication, so it is impossible to apply for a calling card. The red list on the ID card is usually because the holder of the ID card number has bad records such as arrears, taxes, violations of laws and regulations, or the ID card information has been stolen. In this case, in order to protect users' information security and avoid risks, China Unicom and other telecom operators will restrict the id information on the red list and prohibit calling cards and other services.