Start by unpairing from your old phone

Before your Apple Watch can connect to a new phone, it must completely disconnect from the old one. Open the Watch app on your current iPhone, tap the My Watch tab at the bottom, then tap your watch name at the top. Scroll down and tap Unpair Apple Watch. The watch will ask you to confirm — tap Unpair [Watch Name] again.

This step matters because your watch can only pair with one iPhone at a time. If you skip it, the watch will stay locked to your old phone and won't respond to the new one. The unpair process takes a few minutes and backs up your watch settings automatically, so you don't lose your apps or preferences.

Once unpairing finishes, your watch will restart and show the Apple logo. This is normal. Leave it alone until it fully boots up — you'll see the pairing screen appear on the watch itself.

Key Takeaways

  • You must unpair your watch from the old iPhone before it will connect to a new one, using the Watch app on the old phone.
  • The new iPhone must have the latest version of iOS installed before you start pairing, or the process will fail partway through.
  • Pairing happens through the Watch app on your new iPhone, not through your phone's Bluetooth settings — the Watch app handles the full connection.
  • Your watch backs up automatically during unpairing, so your apps, settings, and data transfer to the new phone without manual steps.

Update your new iPhone before you start

Your new iPhone needs to run the current version of iOS, or pairing will fail. Go to Settings > General > Software Update and install any available updates. This usually takes 10 to 20 minutes depending on your internet speed and the size of the update.

The reason this matters: Apple Watch and iPhone communicate using a specific pairing protocol that changes with each iOS version. If your new phone is running an older iOS than your watch expects, they won't speak the same language and the pairing will stall or disconnect partway through.

Open the Watch app and start pairing

On your new iPhone, open the Watch app — it comes built in and has a watch icon. Tap Start Pairing or Pair New Watch if you've paired a watch before. Your iPhone will ask for permission to use Bluetooth and location services. Tap Allow for both.

Your watch should still be on the pairing screen from when it restarted. If it's not, hold down the side button on the watch until you see the power-off slider, then release and hold the side button again until the Apple logo appears and the pairing screen shows up.

Hold your watch up to the iPhone camera

The Watch app will show a circular animation on your iPhone screen. Hold your Apple Watch in front of your iPhone's camera so the watch face is centered in the circle on your phone's screen. Keep it steady for about 10 seconds while the iPhone scans the watch's unique pairing code.

You'll see a spinning circle on both devices while they communicate. This is the watch sending its identity and settings to the iPhone. Don't move the watch or phone during this time — if the scan fails, you'll see a message asking you to try again, and you can straightforward repeat the process.

Once the scan completes, your iPhone will show a confirmation screen with your watch name and a photo of the watch model. Tap Continue to move forward.

Choose your pairing type and set up services

Your iPhone will ask whether you want to pair as a new watch or restore from a backup. If you unaired properly, you'll see an option to restore your previous watch's data — this brings back your apps, watch faces, and settings. Tap Restore from Backup to get everything back the way it was.

Next, your iPhone will ask about Apple Watch Cellular (if your watch model supports it). If you have a cellular plan for your watch, tap Set Up Cellular and follow the prompts with your carrier. If you only want Bluetooth pairing, tap Set Up Later — you can add cellular anytime afterward in the Watch app under Cellular.

The watch will then sync your Apple ID, iCloud settings, and any apps you had installed. This can take 5 to 15 minutes depending on how many apps you had and your internet speed. Your watch may restart during this process — this is normal and you don't need to do anything.

Wait for the full sync to complete

After the initial pairing, your watch will spend the next 10 to 30 minutes downloading your apps, syncing your health data, and updating to the latest watchOS version if needed. During this time, your watch may feel slow or unresponsive. Leave it plugged in and on your wrist so it can complete the sync without interruption.

You can check the progress in the Watch app on your iPhone — look for a progress bar under your watch name in the My Watch tab. Once the bar reaches 100 percent, your watch is fully paired and ready to use.

Troubleshoot if pairing gets stuck

If the camera scan won't work, make sure your iPhone's camera lens is clean and you're in good lighting. Try moving to a brighter room and hold the watch perfectly still. If it still fails after three attempts, restart both devices: force-restart your iPhone by pressing and releasing Volume Up, pressing and releasing Volume Down, then holding the side button until the power-off slider appears. Restart your watch by holding the side button until the power-off slider appears, then slide to power off.

If pairing starts but gets stuck during the sync phase, check that both devices are on the same Wi-Fi network and that your iPhone has a strong signal. If the watch shows an error message about needing a newer watchOS, your iPhone's iOS version is too old — go back to Settings > General > Software Update and check for updates again.

If you see a message saying the watch is already paired to another phone, you didn't fully unpair it from the old device. Go back to the old iPhone, open the Watch app, and complete the unpair process. If you no longer have access to the old phone, you can unpair remotely through iCloud.com by signing in with your Apple ID, but this requires the old phone to be powered on and connected to the internet.

Frequently Asked Questions

Do I lose my data when I unpair my watch?

No. Unpairing automatically backs up your watch data to iCloud, including your apps, watch faces, health data, and settings. When you pair with the new phone, you can restore from that backup and get everything back exactly as it was.

Can I pair my watch to two phones at the same time?

No. An Apple Watch pairs with only one iPhone at a time. If you want to switch phones, you must unpair from the first phone before pairing with the second. You can pair with a different phone later, but not both at once.

What if my new phone is an Android?

Apple Watch only works with iPhone. It will not pair with Android phones, Samsung phones, or any other non-Apple device. If you're switching to Android, you'll need to use a different smartwatch designed for that platform.

How long does the whole pairing process take?

The initial pairing and camera scan takes about 5 to 10 minutes. The full sync of apps and data afterward takes another 10 to 30 minutes depending on how many apps you have. Plan for 30 to 45 minutes total from start to finish, and leave your watch plugged in during the sync phase.

Will my watch work before the sync finishes?

Partially. Once the camera scan completes, your watch will show the time and basic functions. However, your apps won't be available until the sync finishes, and some features like health data may not work until the full sync is done. It's best to wait for the progress bar to reach 100 percent before relying on the watch for anything important.