1. Let's see how it works on Apple's mobile phone. First, open the settings in Apple's mobile phone. In the settings page, find icloud, click in and click the account.

2. Enter the appleid setting interface, where you can add contact information, set a password, etc. If we want to add a credit card, we need to click Pay. The main payment method is credit card, just click Add Credit Card.

3. Fill in the surname, first name and card number. Pay attention to the name of the person who handles this credit card, otherwise the addition will be unsuccessful.

4. click next in the upper right corner, and then add other information, such as expiration date, security code, etc. You also need to check the phone number and address, and then click next to continue the operation.

5. In Baidu Apple official website, then open the website with the word official website, find technical support at the top, click technical support, find the appleid in the page, and then click to get help on the appleid.

6. Log in to your appleid, then click Manage Account on the left, find the payment in the page, and then click Add Credit Card for step-by-step operation.