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How to cancel the supplementary card of the king card?
You can cancel the supplementary card of King Card by the following steps:
1. Open the China Unicom APP and click the service option.
2. In the service interface, click the processing option.
3. In the processing interface, click the option to cancel the account.
4. In the account cancellation interface, select the secondary card and click Next.
5. Then enter your mobile phone number and service password, and click Next.
6. Then follow the prompts to complete the logout.
I hope the above information can help you solve the problem. Please feel free to let me know if you have any other questions.
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