How to Set Up Windows Dynamic Lock with iPhone

Windows Dynamic Lock automatically locks your PC when you walk away with your phone. This guide shows you how to pair your iPhone with Windows via Bluetooth and enable the feature, so your computer secures itself without you having to remember to press Win+L.

What You’ll Need

A Windows 10 or Windows 11 PC with Bluetooth support.
An iPhone (iOS 13 or later recommended) with Bluetooth enabled.
Your Windows account must have a PIN, password, or Windows Hello set up (Dynamic Lock won’t work with a blank password).
Both devices should be within Bluetooth range (about 30 feet or 10 meters) during setup.

Step-by-Step

Turn on Bluetooth on your iPhone. Open Settings > Bluetooth and toggle it on. Keep this screen open for the pairing step.
Open Bluetooth settings on Windows. Click the Start button, type “Bluetooth and other devices settings,” and press Enter. (On Windows 10, it’s “Bluetooth & other devices.”)
Add a new device. In Windows Bluetooth settings, click “Add Bluetooth or other device” (or “Add device” on Windows 10). Choose “Bluetooth” from the list.
Select your iPhone. Windows will scan for nearby devices. Tap your iPhone’s name when it appears (e.g., “John’s iPhone”).
Confirm the pairing code. A six-digit code appears on both your iPhone and Windows. Verify they match, then tap “Pair” on your iPhone and click “Connect” on Windows.
Open Dynamic Lock settings. In Windows, go to Settings > Accounts > Sign-in options (Windows 10) or Settings > Accounts > Sign-in options > Dynamic lock (Windows 11). Scroll down to the “Dynamic lock” section.
Enable Dynamic Lock. Check the box next to “Allow Windows to automatically lock your device when your device is away.” Windows will show a message like “Your phone is paired and will be used to detect when you’re away.”
Test it. Lock your screen manually (Win+L) to ensure the Bluetooth connection is active. Then, with your iPhone in hand, walk out of Bluetooth range. After about 30 seconds to a minute, Windows should lock automatically. Walk back and unlock normally.

Common Mistakes

Bluetooth not turned on for both devices. Dynamic Lock relies entirely on Bluetooth. If either device has Bluetooth off, the feature won’t work.
Pairing the phone but not enabling Dynamic Lock. Pairing alone doesn’t activate the feature. You must also check the box in Sign-in options.
Using a Microsoft account without a PIN/password. If your Windows account has no password, Dynamic Lock is disabled. Set a PIN or password first.
Phone battery saver or airplane mode. Battery saver on iPhone can disable Bluetooth or background scanning. Airplane mode kills all wireless connections.
Forgetting to allow notifications from Windows. On iPhone, if you denied the Bluetooth pairing notification, the connection may not persist. Accept the pairing request fully.

Tips

Keep Bluetooth on for both devices. Dynamic Lock only works when Bluetooth is enabled on both the PC and the iPhone. If you turn off Bluetooth on your phone to save battery, the feature stops.
Use a strong signal. The lock triggers when the Bluetooth signal drops below a threshold. Walls and metal objects can shorten the effective range, so test in your actual workspace.
Set a short screen timeout as a backup. Dynamic Lock can take up to a minute to engage. Set your screen timeout to 1-2 minutes as a safety net.
Re-pair if you change phones. If you get a new iPhone, remove the old one from Windows Bluetooth devices and pair the new one.
Use Dynamic Lock with Windows Hello. When you return, you can unlock with your face or fingerprint, making the whole experience seamless.

Troubleshooting

Dynamic Lock doesn’t lock at all. First, verify Bluetooth is on for both devices. Then check that the Dynamic Lock checkbox is enabled. If it still doesn’t work, remove the iPhone from Windows Bluetooth devices and re-pair it. Restart both devices if necessary.

Phone connects but locks too quickly or too slowly. The Bluetooth signal strength varies with distance and obstacles. If it locks while you’re still at your desk, the signal is too weak—move the PC’s Bluetooth antenna or use a USB Bluetooth dongle. If it never locks, the signal might be too strong; try moving the phone farther away during the test.

Windows says “Your phone is paired” but the phone isn’t listed. This can happen if the Bluetooth connection is lost. Go to Bluetooth settings, remove the iPhone, and pair again. Also, ensure the iPhone isn’t connected to another device that might interfere.

Dynamic Lock works but only sometimes. Check if your iPhone’s Bluetooth is being turned off by Low Power Mode or if Windows is in sleep mode. Dynamic Lock only works when the PC is awake and the screen is on (locked or unlocked).

After a Windows update, Dynamic Lock stops working. Updates can reset Bluetooth drivers or settings. Re-pair the phone and re-enable the checkbox. If the issue persists, update your Bluetooth driver via Device Manager.

Frequently Asked Questions

Does Dynamic Lock work with an iPhone? Yes, Windows Dynamic Lock works with any Bluetooth device that supports the Bluetooth proximity feature, including iPhones. It doesn’t require any special apps.

How far do I need to be for the lock to trigger? Typically, the lock triggers when the Bluetooth signal drops below a certain level, which usually happens at about 10-30 feet (3-10 meters) depending on walls and interference. There’s no exact distance; it’s based on signal strength.

Can I use Dynamic Lock with an Apple Watch instead of my iPhone? No, Dynamic Lock only works with the phone you’ve paired. The Apple Watch is not supported as a proximity device.

Will Dynamic Lock drain my iPhone battery? Bluetooth Low Energy (BLE) is used, so the battery impact is minimal. However, keeping Bluetooth on all day does consume some power. You can turn off Bluetooth when you don’t need it, but then Dynamic Lock won’t work.

Does Dynamic Lock work if my PC is in sleep mode? No, Dynamic Lock only works when the PC is awake. If your PC sleeps, you’ll need to wake it first, and then it will lock if the phone is away.

Can I use Dynamic Lock with multiple phones? Windows allows only one paired phone for Dynamic Lock at a time. If you pair a second phone, it will replace the first one.

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

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