How to cancel the secondary card on the mobile phone?

Call customer service and go to the offline business hall.

1. Call customer service: call the customer service number of the mobile phone operator, explain to the customer service staff that the secondary card should be cancelled, provide relevant identity information for verification, and then follow the instructions of the customer service staff.

2. Go to the offline business hall: Go to the offline business hall of the mobile phone operator, bring relevant identification and supplementary card information, and explain to the staff that they want to cancel the supplementary card, and the staff will help with the relevant procedures. The secondary card is based on the main card, and the users of the secondary card can share the voice, SMS, MMS, data stream, WiFi duration, pre-stored call back fee or free call fee in the basic package of the main card.