How did Apple's mobile phone account get the message that it was logged in elsewhere?

The password of Apple account logged in other places, usually Apple ID, has been leaked. It is recommended to modify the login password of Apple ID immediately.

Taking the iPhone 7 mobile phone as an example, the steps to modify the Apple ID login password are as follows:

1. Click the "Settings" application on your phone.

2. click the Apple ID.

3. Click "Password and Security".

4. Click Change Password.

5. Enter the password of iPhone for authentication.

6. Enter the new password and click Change.