You open the Settings app to change something — a passcode, cellular data, maybe Face ID — and the option sits there greyed out, ignoring every tap. It feels like a bug. In almost every case, though, it is a feature working exactly as designed: something on your iPhone is actively restricting that setting.
A greyed-out setting is Apple’s way of saying the control has been locked by a rule. On older iOS versions that rule was called Restrictions. On current iOS the same system lives inside Screen Time under the name Content & Privacy Restrictions. The moment it is switched on, the affected settings turn grey and stay unresponsive until the restriction is turned off or adjusted.
How to unlock greyed-out iOS settings
- Confirm that restrictions are the cause. When a setting appears greyed out rather than missing, it almost always means Restrictions (or Content & Privacy Restrictions) are enabled. This is common on iPhones configured by a parent, an employer, or anyone who once set up limits and forgot. Restrictions can lock all kinds of controls — from which built-in apps can be removed (see our guide on which built-in iPhone apps you can delete) to whether the phone may install software updates (relevant if you want to completely block iOS 26 updates on iPhone). If the greyed-out option is one an administrator would plausibly lock, restrictions are almost certainly the answer.
- On older iOS: go to Settings > General > Restrictions. On iPhones running iOS 11 and earlier, the controls live at Settings > General > Restrictions. You will be asked for the Restrictions passcode — a separate four-digit code, not your lock-screen passcode. Enter it, then flip the toggles for the settings you want back, or switch Restrictions off entirely. Apple’s Screen Time support guide documents the modern version of these controls.
- On current iOS: go to Settings > Screen Time > Content & Privacy Restrictions. Apple moved the controls in iOS 12: open Settings, tap Screen Time, then Content & Privacy Restrictions, and enter your Screen Time passcode. You can disable Content & Privacy Restrictions entirely — which restores every greyed-out setting at once — or leave them on and adjust individual allowances, such as re-allowing account changes or passcode changes. MacRumors’ iOS parental controls walkthrough covers the same panels if you want a visual reference.
If it still doesn’t work
If nothing is locked under Content & Privacy Restrictions and the setting is still grey, the iPhone may be managed by an organization — check Settings > General > VPN & Device Management for an installed profile. A device supervised with Apple Configurator can also lock settings without a visible passcode prompt. Erasing the iPhone and setting it up as new removes a forgotten restrictions profile — unless the phone is enrolled in corporate device management, in which case the restrictions return automatically.
Frequently asked questions
Why are my iPhone settings greyed out instead of missing?
Greyed out means the setting exists but is locked by a restriction; a missing setting usually means your device or iOS version does not support it. Restrictions freeze controls in place, so lifting the restriction brings the grey option back to life immediately.
I don’t know the Screen Time passcode. What now?
The Screen Time passcode is separate from your lock-screen passcode, so try any four-digit code you might have used when it was set up. If the phone is in a Family Sharing group, the family organizer can reset it. Otherwise, erasing the iPhone and setting it up as new (not from a backup) clears a forgotten Screen Time passcode.
Conclusion
Settings that cannot be changed are rarely broken — they are restricted. The fix takes less than a minute once you know where to look: Settings > Screen Time > Content & Privacy Restrictions on modern iOS, Settings > General > Restrictions on older versions. Enter the passcode, lift the restriction, and the grey toggles come back to life.
