How does Unicom app cancel the mobile phone number?

The method/steps for Unicom app to cancel the mobile phone number are as follows:

1: Log in to China Unicom app, click Services, click Transaction, and click Account Cancellation.

2. Check the account cancellation reason, click Next, check the user description, and then click Next.

3. Enter the SMS verification code and click Next to confirm the cancellation of your mobile phone number.