How to view Unicom's blacklist

If you need to check whether my ID card is on Unicom's blacklist, you can bring your valid ID card to the business hall for consultation. Because the policies of different cities are different, the local policies shall prevail. Blacklist users include the following three types: 1. Users who have been shut down for three months due to arrears, including those who have cancelled their accounts and those who have not. 2. Malicious arrears users, such as users who maliciously defraud international information stations and users who maliciously defraud roaming charges in different places. 3. Users suspected of short message fraud, fraud and other criminal acts identified by public security organs.