How to check the number of the secondary card?

There are several ways to query the secondary card number:

1. The holder of the secondary card calls the operator's customer service phone to make an inquiry, and the customer service staff will verify it according to the identity information and related materials provided by the user and inform the user of the secondary card number.

2. The holder of the secondary card goes to the offline business hall to inquire, and the user only needs to bring the identity certificate and relevant information to the staff, who will look up the secondary card number in the system and inform the user.

3. Search in the phone menu. The user opens the phone setup interface, finds "SIM Management" or "Card Management" in the setup interface, and selects "Secondary Card".