How do I stop my phone screen dimming or locking too fast?
The auto-lock setting, the battery saver that overrides it, and the ways to keep a screen on for a recipe or a map.
- Difficulty
- beginner
- Time
- 5 min
- Read
- 2 min
Short answer
Auto-lock or screen timeout is in the display settings and can usually be set from fifteen seconds to several minutes. If it keeps reverting, a battery-saving mode is overriding it — that is the usual reason changing it appears not to work.
A screen that locks while you are reading from it is a small, constant irritation with a one-minute fix. The complication is that several other settings quietly override it.
Step by step
- Change the auto-lock setting.In display settings, called auto-lock on iPhone and screen timeout on Android. Options usually run from fifteen seconds to five minutes, sometimes never.
- Check whether battery saver is on.Low power and battery saver modes force a short timeout and ignore your setting. This is the single most common reason the change appears not to stick.
- Look for attention-aware settings.Some phones keep the screen on while they detect you looking at it, using the front camera. If it is unreliable, turning it off makes the behaviour predictable again.
- Turn on adaptive or auto-brightness.If the complaint is dimming rather than locking, this is usually it. Auto-brightness dims in low light, and it can be turned off or its baseline adjusted.
- Check for a screen-attention or keep-awake option in the app.Recipe apps, satnav, music and reading apps frequently have their own keep-the-screen-on setting, which is better than changing it system-wide.
- Use a guided or kiosk mode for one task.iPhone's guided access and Android's screen pinning both hold the screen on a single app. Useful when following a recipe or handing the phone to a child.
- Weigh the battery cost.The screen is the largest single consumer of battery on a phone. A long timeout is fine on charge and noticeably costly through a day out.
- Set a shorter lock for security if it matters.A separate setting controls how long after the screen turns off before a passcode is required. That is the security-relevant one and can stay short even if the display timeout is long.
Tips
- The setting is usually different on a tablet from a phone, even from the same manufacturer, and neither inherits from the other.
- Never is an option on most phones. It is genuinely useful on a device kept on charge as a display, and a fast way to flatten a battery otherwise.
- If the screen dims and then brightens repeatedly, that is auto-brightness reacting to changing light rather than a fault.
Questions people ask
Why does my phone screen keep turning off so quickly?
The auto-lock or screen timeout setting is short, or a battery-saving mode is overriding it. Check the display settings first, then check whether low power mode is on.
How do I keep my phone screen on while cooking?
Set a longer auto-lock in display settings, or use guided access on iPhone or screen pinning on Android to hold it on one app. Many recipe apps also have their own keep-screen-on setting.