1. User's personal information is inaccurate. All-in-one-card general inquiry service needs to inquire about the number of cards opened by each operator according to the personal information filled in by the user. If the information filled in by the user is incorrect, the query will fail, and the user needs to fill in the information again to ensure that it is correct before submitting the query.
2. Check the mobile phone number that I didn't handle. If the mobile phone number filled in by the user is handled as a family member, it will be judged as a non-personal inquiry when submitting the inquiry, and the inquiry will also fail.
3. The data has not been synchronized. If users use the new mobile phone card to query, the system data may be out of sync because the universal query service of one card is cross-telecom enterprise query. In this case, users are advised to make inquiries after a week on the Internet.
These reasons may cause the general query of certificates to fail.