iPhone Auto-Lock Greyed Out? Fixes That Work

If your iPhone’s Auto-Lock setting is greyed out, it usually means a setting is overriding it — most commonly Low Power Mode, which forces a 30-second lock. The fix is to turn off Low Power Mode, then check other restrictions like Screen Time or a managed device profile. Below are the exact steps and the full list of causes.

Why Auto-Lock Goes Grey

Auto-Lock controls how long your iPhone waits before locking itself. When it’s greyed out, iOS is telling you that you cannot change it right now because another feature has taken control. The most frequent culprit is Low Power Mode, which automatically sets Auto-Lock to 30 seconds and disables the option. Other causes include:

• Screen Time restrictions — a parent or administrator can lock the Auto-Lock setting.
• Device management profiles — work or school iPhones often enforce a fixed lock time.
• Battery saving shortcuts — an automation that turns on Low Power Mode at certain times.
• Older iOS bugs — rare, but a restart usually clears them.

How to Fix It (Step by Step)

1. Turn off Low Power Mode: Go to Settings → Battery and toggle off Low Power Mode. The Auto-Lock option should become tappable immediately.
2. Check Screen Time: Go to Settings → Screen Time → Content & Privacy Restrictions → Allowed Apps. Make sure Screen Time is not restricting changes. Also check Settings → Screen Time → Content & Privacy Restrictions → Passcode Settings — if a passcode is set, you may need it to change restrictions.
3. Look for a configuration profile: Go to Settings → General → VPN & Device Management. If you see a profile installed, it may enforce a lock timeout. You can remove it if you are the administrator, but on a work phone you may need to ask your IT department.
4. Restart your iPhone: Sometimes a simple reboot clears a temporary glitch. Press and hold the side button and either volume button until the slider appears, then slide to power off.
5. Update iOS: Go to Settings → General → Software Update and install any pending update. Apple has fixed similar bugs in the past.

What Each Setting Actually Does

Auto-Lock options are: 30 seconds, 1 minute, 2 minutes, 3 minutes, 4 minutes, 5 minutes, and Never (on some models). Choosing a shorter time improves battery life and privacy; choosing a longer time is convenient when reading or watching. The “Never� option is only available when the phone is not in Low Power Mode and no restrictions are active.

Note that even if you set Auto-Lock to “Never,� your iPhone will still lock when you press the side button or when you place it face-down if you have that feature enabled in Settings → Display & Brightness (on Face ID models).

Common Questions and Misconceptions

“My Auto-Lock is greyed out but Low Power Mode is off.� Then check Screen Time restrictions. Go to Settings → Screen Time → Content & Privacy Restrictions and see if Passcode Settings or Allowed Apps are restricted. If you don’t know the Screen Time passcode, you may need to reset it via your Apple ID (if you set it up that way).

“Does Auto-Lock affect battery life?� Yes, significantly. The screen is the biggest battery drain. A 30-second lock saves more battery than a 5-minute lock, but it also means more frequent unlocking. Most users find 1–2 minutes a good balance.

“Can I set Auto-Lock to Never permanently?� You can, but only when Low Power Mode is off and no restrictions are active. However, iOS may reset it to 30 seconds when you turn on Low Power Mode, and it will stay at 30 seconds until you change it again.

How to Keep Auto-Lock From Greyed Out Again

• Don’t leave Low Power Mode on all the time — turn it off when you don’t need it.
• If you use a Shortcuts automation that enables Low Power Mode, edit it to also turn off after a certain time.
• Check your Screen Time settings after a family member uses your phone.
• If you have a work profile, ask your IT admin if they can relax the lock timeout.

What to Do If Nothing Works

If you’ve tried all the steps above and Auto-Lock is still greyed out, the issue is almost certainly a device management profile or a Screen Time restriction you cannot see. Try these last resorts:

1. Reset all settings: Go to Settings → General → Transfer or Reset iPhone → Reset → Reset All Settings. This does not delete your data, but it resets Wi-Fi passwords, wallpapers, and some preferences. It will also remove any configuration profiles that are not locked.
2. Contact Apple Support: If the problem persists, it may be a software bug or a hardware issue with the side button (if the phone thinks the button is held down). Apple Support can run diagnostics.

Frequently Asked Questions

Why is Auto-Lock greyed out on my iPhone 13? The most common reason is Low Power Mode. Turn it off in Settings → Battery. If it’s still greyed out, check Screen Time restrictions and device management profiles.

Can I change Auto-Lock while Low Power Mode is on? No. Low Power Mode forces a 30-second Auto-Lock and disables the setting. You must turn off Low Power Mode first.

Does Screen Time block Auto-Lock? Yes, if a parent or administrator sets a restriction under Content & Privacy Restrictions. You’ll need the Screen Time passcode or the administrator’s permission to change it.

Will a factory reset fix greyed out Auto-Lock? Usually yes, if it’s a software issue. But a factory reset erases all data, so try Reset All Settings first. If the problem is a management profile, that profile will be removed by a full reset (unless it’s a supervised device).

Is there a way to force Auto-Lock to “Never� without the setting? You can use the “Guided Access� feature (in Settings → Accessibility → Guided Access) to temporarily disable the lock, but it’s not a permanent replacement. For a permanent solution, you must fix the underlying cause.

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