IPhone turns on SMS (icloud cloud information is currently disabled).

1. This is because of system upgrade. You can open icloud official website with a browser, log in with an AppleId, and prompt for double authentication input. You can fix it after logging in successfully. First, you need to open icloud official website in your browser.

2. After entering the AppleId in the login interface, click the arrow at the back.

3. Then verify the mobile phone and enter the phone number used on the mobile phone.

4. Enter the verification message received on the mobile phone for verification.

5. Click OK in the pop-up dialog box, and you can fix this problem after logging in.