How do I stop my iPhone screen from dimming?
In Accessibility, tap “Display & Text Size.” In “Display & Text Size,” scroll to the bottom and toggle the “Auto-Brightness” option by flipping the switch beside it. Your iPhone will no longer alter the brightness levels automatically. You’ll have to manually do it by adjusting the brightness bar in Control Center.
Why does my screen go dark when its on full brightness?
Problem #2: My screen is constantly too dark.
Assuming your display isn’t damaged, the most common culprit for a consistently darkened screen is power saving mode. When your battery is close to being drained, your smartphone can turn off a number of background operations and tweak the display to use less power.
