Reason: The current system version type is wrong, just restore the phone through double clearing.

Solution:

Turn off the phone completely;

2. Press the power button + volume up button at the same time and release when you see the word recovery;

3. You can also directly enter the recovery mode in the system update app;

4. Check the clear data option. Never check the update system, or problems will occur. Remember;

5. Wait for the restart to complete the normal OTA upgrade.