How to change this mobile phone number when shopping in Apple Store?

Just add the trusted phone number in the phone settings.

The method is as follows:

1. Enter the "Settings" interface of the mobile phone.

2. Click to enter "Itunes Store and App Store".

3. Click "April ID: * * * * *" in the figure.

4. Click to select "View Apple ID".

5. Click and select "Apple ID" to enter the relevant interface.

6. In this interface, enter the account number and password, and click the arrow in the lower right corner to enter.

7. Click and select the "Safety" button.

8. In the pop-up page, find "Add Trusted Phone Number" to add a number.