You have a slider to choose your own level of brightness. When you activate auto brightness your phone should choose the right level of brightness to suit your surroundings but it would not increase it more than what you've set it on the slider.
You have a slider to choose your own level of brightness. When you activate auto brightness your phone should choose the right level of brightness to suit your surroundings but it would not increase it more than what you've set it on the slider.