First turn on the phone, find "System Tools" on the desktop, and click Enter.
Second, after entering, find the item "System Update" and click Enter.
3. After entering the system update, find the symbol in the black box in the upper right corner of the page below and click Enter.
4. After entering, find the item "Automatic Check Settings" and click Enter.
5. Turn off the switches of "Automatically check for updates only under WLAN" and "Intelligent updates" after entering, so that the system will not update automatically.