How to Enable Lockdown Mode on iPhone

Lockdown Mode is an extreme security setting on iPhone that blocks most attachments, link previews, and incoming invitations, and disables certain web technologies to protect against highly targeted cyberattacks. You can turn it on in Settings, and you’ll need your iPhone passcode to confirm. This guide walks you through enabling it, what to expect, and how to turn it off if needed.

What You’ll Need

An iPhone running iOS 16 or later (Lockdown Mode is available on iPhone 8 and newer).
Your iPhone passcode (required to confirm the change).
Apple ID password (only if you need to turn it off later, as it may require signing out of some services).

Step-by-Step

Open the Settings app on your iPhone. It’s the gray gear icon on your home screen.
Scroll down and tap Privacy & Security. This is usually about two-thirds of the way down the Settings list.
Scroll to the bottom of the Privacy & Security screen. You’ll see Lockdown Mode listed under the “Security” section. Tap it.
Read the brief explanation of what Lockdown Mode does. Then tap Turn On Lockdown Mode.
A confirmation screen appears, describing the restrictions. Tap Turn On Lockdown Mode again to proceed.
Your iPhone will ask for your passcode. Enter it to confirm.
After entering your passcode, a final screen appears, warning that Lockdown Mode will restart your iPhone. Tap Turn On & Restart.
Your iPhone will restart. When it comes back on, you’ll be in Lockdown Mode. You’ll see a banner or a lock icon in the status bar when active.

Common Mistakes

Not reading the restrictions before enabling: Lockdown Mode blocks most iMessage attachments (except images), disables link previews, and blocks incoming FaceTime calls from people you haven’t called before. If you rely on these features, you may be surprised. Know what you’re getting into.
Forgetting your passcode: You need your passcode to turn Lockdown Mode off. If you forget it, you’ll have to erase your iPhone and restore from a backup, which is a hassle.
Expecting it to behave like a VPN or antivirus: Lockdown Mode is not a general security tool; it’s designed for high-risk users (journalists, activists, politicians) who might be targeted by state-sponsored spyware. It doesn’t block all threats, and it may break everyday functionality.
Turning it on and then not knowing how to turn it off: The setting is buried in the same place, but the process requires your passcode and may prompt you to sign out of Apple services. Make sure you know how to reverse it.

Tips

Before enabling Lockdown Mode, back up your iPhone to iCloud or your computer. If anything goes wrong, you can restore.
If you’re enabling it for a specific trip or event, set a reminder to turn it off afterward. You’ll need to go back to Settings > Privacy & Security > Lockdown Mode and tap Turn Off Lockdown Mode.
Lockdown Mode also works on Apple Watch if paired, but you must enable it on the iPhone first. The watch will automatically follow the iPhone’s setting.
If you use a Mac or iPad, you can enable Lockdown Mode there separately, but the iPhone setting is independent.
After enabling, test that your essential apps still work—especially banking, messaging, and email. Some may have reduced functionality.

Troubleshooting

Lockdown Mode doesn’t appear in Settings: Make sure your iPhone is running iOS 16 or later. Go to Settings > General > Software Update to check. If you’re on an older iOS, update first.
The “Turn On” button is grayed out: This usually means you have a configuration profile installed (e.g., from a school or employer). You may need to remove the profile temporarily. Go to Settings > General > VPN & Device Management and delete any profiles, then try again.
Your iPhone restarts but Lockdown Mode isn’t active: After restart, check Settings > Privacy & Security > Lockdown Mode. If it says “On,” you’re fine. If it says “Off,” repeat the steps and make sure you tap “Turn On & Restart” and not just “Cancel.”
You can’t receive FaceTime calls or messages: This is a known restriction. In Lockdown Mode, incoming FaceTime calls from unknown numbers are blocked, and iMessage attachments are limited. You can still make outgoing calls, but the other person may not be able to call you. To fix, you’ll need to turn off Lockdown Mode.
Websites look broken or don’t load: Lockdown Mode disables certain web technologies (like JavaScript JIT). Some sites may not function. You can temporarily allow a specific site by tapping the “AA” icon in Safari and selecting “Turn Off Lockdown Mode for This Website.”

Frequently Asked Questions

Does Lockdown Mode block all viruses?

No. It reduces the attack surface by blocking common vectors like malicious attachments and web exploits, but it’s not a replacement for antivirus or common sense. It’s designed to protect against highly sophisticated spyware, not everyday malware.

Will Lockdown Mode affect my battery life?

It can. Because some background processes are limited, you may see slightly longer battery life, but the restart and reduced functionality might make your phone feel different. There’s no significant drain either way.

Can I still use WhatsApp, Telegram, or other messaging apps?

Yes, third-party messaging apps generally work, but some features like link previews and file downloads may be restricted. You can still send text and images.

How do I turn off Lockdown Mode?

Go to Settings > Privacy & Security > Lockdown Mode, tap “Turn Off Lockdown Mode,” enter your passcode, and confirm. Your iPhone will restart, and the restrictions are lifted.

Is Lockdown Mode available on all iPhones?

It’s available on iPhone 8 and later, running iOS 16 or newer. Older devices or those on older iOS versions won’t have the option.

Will Lockdown Mode protect me from phishing texts?

It blocks link previews and some attachments, which can reduce the chance of accidentally tapping a malicious link. However, it doesn’t filter messages; you still need to be cautious about what you open.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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