iPhone Screen Keeps Dimming on iOS 26.3? Here’s How to Stop It

Why iPhone brightness keeps dropping

Auto-Brightness, Attention Aware features, high device temperature, and Low Power Mode can all reduce brightness automatically.

Step-by-step fix flow

1. Turn off Low Power Mode temporarily.
2. Disable Auto-Brightness in Settings > Accessibility > Display & Text Size.
3. Disable Attention Aware Features in Face ID settings.
4. Remove thick case and let device cool if warm.
5. Update iOS and restart iPhone.
6. Reset All Settings if dimming remains aggressive.

Practical troubleshooting checklist

• Low Power Mode off during testing
• Auto-Brightness tested on/off
• Phone temperature normal
• No persistent performance warnings
• Issue tested indoors and outdoors

FAQ

Can overheating force dimming even at 100% brightness?

Yes. iPhone may reduce brightness to protect internal components.

Will Reset All Settings erase data?

No personal files are erased, but settings like Wi-Fi and notifications are reset.