1, Apple ID is the mailbox. That is, account name+@+mail service provider (such as icloud.com).

For example, what is the form of an e-mail address like j.appleseed@icloud.com? Apple ID

2. Use the mobile phone number as the Apple ID user name.

Every time you set up an iPhone, iPad or iPod touch, you can choose whether to sign in with an existing Apple ID or create a new account. If you live in Chinese mainland or India and create a new Apple ID through iOS 1 1 or later, you can use (+86) mobile phone number (in Chinese mainland) or (+9 1) number (in India) as your user name. To create a new account, simply select "Create Apple ID" from the Apple ID login screen and follow the instructions.

Whenever you log in to a new device, application or service, just enter your mobile phone number (including country code) and password. No matter where you log in, you must use the same Apple ID, so that Apple devices and services can work together seamlessly.

If you already have an Apple ID in the form of an email address, you can't change it to an Apple ID in the form of a mobile phone number. However, you can associate an account with another phone number or email address on the Apple ID account page.