Unbound credit card process:

1. Open iTunes, enter the App Store, find the free software list on the right, select a software and click "Get";

2. The login box will pop up, and click "Create Account";

3. fill in the relevant information needed to create an Apple ID. Please note that the email address should be real, because it needs to be verified later; Passwords must contain uppercase and lowercase letters and numbers; Remember the answer to the secret question, so as to retrieve the password.

4. payment method: you can choose "none", so that the credit card will not be bound. Then fill in the corresponding information.

5. Finally, go to the mailbox for verification, and an Apple ID without a credit card is successfully applied.