How to Open Your Apple Watch with Your iPhone

This guide explains how to pair and unlock your Apple Watch using your iPhone, covering the initial setup process and the automatic unlock feature that lets your watch bypass its passcode when your phone is nearby. You will need your Apple Watch, your iPhone, and both devices charged to at least 50% for the initial pairing.

What You’ll Need

Your Apple Watch and iPhone
Both devices charged to at least 50%
Your iPhone with Bluetooth and Wi-Fi turned on
Your Apple ID password (for iCloud setup)
A stable internet connection

Step-by-Step

Charge both devices. Place your Apple Watch on its magnetic charger and plug your iPhone into power. Wait until both show at least 50% battery to avoid interruptions during setup.
Turn on your Apple Watch. Press and hold the side button (the flat button below the Digital Crown) until the Apple logo appears. If the watch doesn’t turn on, connect it to its charger for a few minutes first.
Bring your iPhone close to the watch. Keep them within a few inches of each other. Your iPhone should automatically show a message that says “Use your iPhone to set up this Apple Watch.” If it doesn’t appear, open the Apple Watch app on your iPhone and tap “Start Pairing.”
Scan the watch face. When prompted, position your iPhone’s camera so the watch face appears inside the viewfinder frame. Hold still until the pairing animation completes. If the camera fails, tap “Pair Apple Watch Manually” and follow the on-screen instructions to select your watch model.
Choose your setup options. On your iPhone, decide whether to set up the watch as a new device or restore from a backup. For a first-time watch, select “Set Up as New Apple Watch.” Then choose your wrist preference and review the Terms and Conditions, tapping “Agree” to continue.
Sign in with your Apple ID. Your iPhone will ask you to confirm your Apple ID. Enter your password if required. This enables features like iCloud backup, Find My, and App Store downloads.
Create a passcode. The watch will ask you to set a 4-digit passcode. Enter it on the watch face using the keypad, then enter it again to confirm. This passcode protects your data and is required for Apple Pay.
Set up additional features. Follow the prompts to enable or skip features such as:
- Apple Pay (requires your card details)
- Siri (requires your voice)
- Emergency SOS and Medical ID
- Activity and fitness tracking
- App installation from your iPhone
Tap “Continue” or “Skip” for each as you prefer.
Wait for syncing to finish. The watch will show a progress ring as it syncs with your iPhone. This can take 5–30 minutes depending on how many apps and settings are being transferred. Keep the devices close together and do not restart either one during this time.
Enable Unlock with iPhone. After the initial setup is complete, open the Apple Watch app on your iPhone. Tap “Passcode” (or “My Watch” > “Passcode”) and toggle on “Unlock with iPhone.” This lets your watch unlock automatically when you raise your wrist while your iPhone is unlocked and nearby.
Test the unlock feature. Lock your watch by pressing the side button and then raise your wrist while your iPhone is unlocked. The watch should vibrate briefly and show the watch face without asking for your passcode.

Common Mistakes

Skipping the passcode. Without a passcode, the “Unlock with iPhone” option is not available. You must set a passcode first.
Keeping Bluetooth off. The unlock feature relies on Bluetooth. If your iPhone’s Bluetooth is disabled, the watch will not unlock automatically.
Interrupting the sync. Moving too far away from your iPhone or putting the watch on the charger mid-sync can cause errors. Wait for the sync to complete fully.
Using an outdated iOS or watchOS. Older software versions may have bugs or missing settings. Update both devices before pairing if possible.
Confusing “Unlock with iPhone” with “Unlock with Apple Watch.” The first unlocks your watch using your phone; the second unlocks your Mac using your watch. They are separate settings.

Tips

Keep your iPhone unlocked when you raise your wrist. The watch checks if your phone is unlocked; if the phone’s screen is off or locked, the watch will ask for its own passcode.
If you wear a mask, Face ID may not unlock your iPhone, which blocks the watch unlock. Consider using Apple Watch to unlock your iPhone instead (on supported models) by going to Settings > Face ID & Passcode and enabling “Apple Watch to Unlock.”
For a faster setup, back up your previous Apple Watch before unpairing it. You can restore that backup to the new watch, saving time on reconfiguring settings.
If you plan to use the watch for swimming, enable “Water Lock” in Control Center after setup to prevent accidental taps.
Charge the watch overnight before your first full day of use. Initial setup and syncing can drain the battery faster than normal.

Troubleshooting

Pairing screen doesn’t appear on your iPhone. Make sure Bluetooth and Wi-Fi are on, and that both devices are charged. Restart both devices by turning them off and on again, then try opening the Apple Watch app and tapping “Start Pairing” manually.

Camera scan fails repeatedly. Move to a brighter area, clean the camera lens, and hold the watch steady. Alternatively, tap “Pair Apple Watch Manually” and choose your watch model from the list.

Watch says “Pairing Failed” or “Unable to Pair.” Reset the watch by pressing and holding the side button and the Digital Crown together for at least 10 seconds until the Apple logo appears. Then try pairing again. If that fails, erase the watch by going to Settings > General > Reset > Erase All Content and Settings on the watch itself.

Unlock with iPhone doesn’t work. Check that the toggle is on in the Apple Watch app under Passcode. Ensure your iPhone has a passcode set and that you are not wearing the watch too loosely (it needs skin contact to detect your wrist). Also confirm that your iPhone’s Bluetooth is on and that the watch is not in Airplane Mode.

Syncing takes too long. This is normal for the first setup. Make sure both devices are plugged into power and within a few feet of each other. You can still use the watch for basic functions while syncing continues in the background.

Watch asks for passcode even when iPhone is unlocked. This happens if you’ve restarted the watch, removed it from your wrist, or if the watch hasn’t detected your wrist for a while. Simply enter the passcode once, and the automatic unlock will resume.

Frequently Asked Questions

Q: Can I use my Apple Watch without an iPhone?
A: Yes, but setup requires an iPhone. After pairing, the watch can work independently for many tasks like fitness tracking, music playback, and Apple Pay, but you’ll need the iPhone for initial configuration and app installation.

Q: Does the watch unlock every time I raise my wrist?
A: Only when your iPhone is unlocked and within Bluetooth range (about 30 feet). If your phone is locked or out of range, the watch will ask for its passcode.

Q: What if I forget my watch passcode?
A: You’ll need to erase the watch. Place it on its charger, press and hold the side button until you see the power off slider, then press and hold the Digital Crown and tap “Erase Apple Watch.” You can then restore from a backup.

Q: Can I pair my watch with a different iPhone later?
A: Yes. Unpair from the current iPhone via the Apple Watch app (tap your watch at the top, then the “i” icon, then “Unpair Apple Watch”). Then pair it with the new iPhone following the same steps above.

Q: Does “Unlock with iPhone” work with any iPhone model?
A: It works with iPhone 6s or later running iOS 14 or newer. Check your iPhone’s compatibility in Settings > General > About.

Q: Will my watch still unlock my Mac after this setup?
A: No, that’s a separate feature. To unlock your Mac with your Apple Watch, you need to enable it on the Mac under System Settings > Touch ID & Password, and ensure both devices are signed into the same Apple ID with Wi-Fi and Bluetooth on.

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

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