How to Change Auto-Lock When an iPhone Locks Too Quickly

An iPhone screen that turns off too quickly usually needs a longer Auto-Lock duration. Open Settings > Display & Brightness > Auto-Lock, select a longer interval such as 2, 5, or 10 minutes, or choose Never when continuous screen access is required.

Steps

Open the Settings app on the iPhone.
Tap Display & Brightness.
Tap Auto-Lock.
Select the preferred duration. Available options can include 30 seconds, 1 minute, 2 minutes, 5 minutes, 10 minutes, or Never.
Lock and unlock the iPhone to confirm the new screen timeout.

Common Issues and Fixes

Auto-Lock is grayed out: Low Power Mode is usually enabled. Open Settings > Battery and turn off Low Power Mode, then check Display & Brightness > Auto-Lock again.
The iPhone screen still turns off too quickly: The selected Auto-Lock period may not have been saved. Reopen Auto-Lock, select the desired duration, and test the setting.
The Auto-Lock option remains unavailable: A configuration profile, workplace policy, school restriction, or device-management setting may control the timeout. Check Settings > General > VPN & Device Management.
The screen dims before locking: Screen dimming is normal before Auto-Lock activates. A longer Auto-Lock period prevents locking but may not remove every automatic brightness adjustment.
Auto-Lock changes after charging: Low Power Mode can activate automatically when battery power is low. Check the battery setting after charging or restarting the iPhone.

Quick Tips

Never prevents automatic locking but can increase battery use and reduce privacy.
Face ID models may keep the display active while the screen detects attention. Check Settings > Face ID & Passcode > Attention-Aware Features if screen behavior seems inconsistent.
Auto-Lock controls inactivity timeout, not the duration of an active video, call, navigation session, or game.
A managed iPhone may enforce a shorter timeout even after a longer option is selected.
Updating iOS can resolve unusual settings behavior. Check Settings > General > Software Update before changing advanced configurations.

Why is Auto-Lock grayed out on an iPhone?

Low Power Mode is the most common cause. Turning off Low Power Mode under Settings > Battery usually restores the Auto-Lock choices.

Can Auto-Lock be set to Never on an iPhone?

Yes. Select Never under Settings > Display & Brightness > Auto-Lock. The option may be unavailable while Low Power Mode or an organization-managed restriction is active.

MobileTrans

Transfer phone data seamlessly

Available on: