The reason is that the software version is too low.
How to change ID on Apple mobile phone:
1. Click to enter the settings page
2. After clicking to enter the settings, find iCloud in the settings
< p>3. After clicking to enter iCloud, you will see the ID account currently logged in4. To reset the ID, the first thing is to clear and log out the existing login account, that is, at the bottom of the iCloud interface, click Delete Account.
5. After the deletion is completed, you need to re-enter the iCloud interface to log in to the new ID account; then fill in the new ID account number and password to confirm the login and the login is complete.
In summary, the ID account replacement can be completed.