Problem 1:

When automatic brightness adjustment is enabled, the screen brightness of the phone won't adjust to the maximum value when used in sunlight or under a bright light.

Cause 1:

When you use your phone for an extended period of time or expose it to sunlight, its temperature will go up. To prevent possible overheating in this case, your phone will not set the screen brightness to the maximum value.

Solution 1:

It is recommended that you move to an indoor area or a darker environment.

Problem 2:

When automatic brightness adjustment is enabled, the screen brightness of the phone won't adjust to the minimum value in a completely dark environment.

Cause 2:

The automatic brightness adjustment feature has been tested and verified in various dark environments, and is designed to meet the needs of the majority of users. You can also adjust the brightness manually if you have particular requirements.

Solution 2:

If you feel that the phone screen is too bright, adjust the brightness manually according to your needs.