How to cancel the card if I lose my phone?

You need to apply for deactivation and account cancellation in the corresponding operator APP. The operation method is as follows:

Software: China Unicom Mobile Business Hall 7.4.2?

Device: Huawei V30

Operating system: EMUI 10.0

1. Open the Unicom Mobile Business Hall in the red box, as shown below:

2. Then click on the service pointed by the red arrow, as shown in the picture below:

3. Scroll down to find the account cancellation, as shown in the picture below:

4. Select the reason for canceling the account, as shown below As shown:

5. After entering the SMS verification code, as shown in the figure below:

6. Click Next to confirm, as shown in the figure below: