How to query the number of Unicom's secondary card?

Unicom secondary card number query method:

1. Download Unicom's mobile phone business hall, log in with your mobile phone number and service password, and then enter "My"-"My Package"-"My Main and Secondary Card Member Information" for inquiry;

2. Log on to the website of Unicom's online business hall, and enter "Query"-"Woworld"-"Principal and Secondary Card Members" for query;

3. Call 100 10 customer service hotline, and transfer to the manual desk for inquiry.

4. The owner himself holds the original valid ID card to inquire at the nearest Unicom business hall.