The basic process: unpair the old phone, then pair the new one

When you get a new iPhone, your Apple Watch does not automatically switch to it. You need to unpair the watch from your old phone first, then pair it to the new one. This takes about 10 to 15 minutes and requires both devices to have power and be near each other.

The watch stores a backup of its settings and apps during the unpair process, so you do not lose your data. When you pair it to the new phone, it restores from that backup automatically. If something goes wrong during pairing, you can start over without losing anything permanent.

Key Takeaways

  • Unpair your watch from the old iPhone using the Watch app before you set up the new phone, or when ready after if the old phone is no longer available.
  • The watch creates a backup during unpair that includes your apps, settings, and health data, so you do not need to manually save anything.
  • Pairing to the new iPhone happens inside the Watch app on the new phone, not on the watch itself.
  • If pairing fails partway through, force-restart both devices and try again — the backup is still there and you can pair as many times as needed.

Step 1: Unpair from your old iPhone

Open the Watch app on your old iPhone. Tap the My Watch tab at the bottom, then tap the watch name at the top. Scroll down and tap Unpair Apple Watch. You will see a warning that says your watch will be erased and a backup will be created. Tap Unpair again to confirm.

The unpair process takes a few minutes. Your watch will restart and show the Apple logo. Do not interrupt it or close the Watch app. When it finishes, the watch screen will show a large question mark or a pairing code — this is normal and means it is ready to pair to a new phone.

If you no longer have access to your old iPhone (it is lost, broken, or you already returned it), you can skip this step. Your watch will still pair to the new phone, though the process takes slightly longer because the watch has to be erased remotely. You will need to know your Apple ID password.

Step 2: Set up your new iPhone

Turn on your new iPhone and go through the initial setup. When you reach the screen that says Apps & Data, choose Restore from iCloud Backup or Restore from Mac. This restores your iPhone data, but it does not affect the watch pairing — you handle that separately in the next step.

You can also choose Set Up as New iPhone if you prefer a fresh start. Either way, finish the iPhone setup completely before you try to pair the watch. The Watch app needs to be installed and ready to use.

Step 3: Pair the watch to the new iPhone

Open the Watch app on your new iPhone. Tap Start Pairing. Hold your iPhone camera up to the watch face — the watch will show an animated circle. Keep the watch in frame until the iPhone says pairing is complete. This usually takes 30 seconds to a minute.

If the camera does not work or you cannot hold the watch steady, tap the option that says Pair Apple Watch Manually instead. You will type in a six-digit code that appears on the watch screen into your iPhone. This is slower but works just as well.

Step 4: Restore your watch backup

After pairing completes, the iPhone will ask whether you want to restore from backup. Tap Restore. The watch will read your apps, settings, and health history from iCloud. This can take 5 to 10 minutes depending on how much data you have and your internet speed.

During restore, your watch may restart several times and show a progress bar. Leave both devices plugged in and near each other. Do not force-restart the watch or close the Watch app on the iPhone. When the progress bar reaches 100 percent, your watch is ready to use.

What to do if pairing fails or gets stuck

If pairing stops partway through or the Watch app shows an error, force-restart both devices. On the watch, press and hold the side button until you see Power Off, then slide to power off. Wait 10 seconds, then press and hold the side button again until the Apple logo appears. On the iPhone, use the standard restart method for your model.

After both devices restart, open the Watch app again and tap Start Pairing. You do not need to unpair again — your backup is still saved. Most pairing failures are caused by weak Wi-Fi or Bluetooth interference, so try pairing in a different room or closer to your router.

If you see a message that says the watch cannot be paired because it is already paired to another account, you will need to erase the watch completely. In the Watch app, go to General > Reset > Erase Apple Watch. This deletes the backup, so use this only if you cannot unpair normally and do not need your old data.

Cellular watch pairing and carrier setup

If your watch has cellular (LTE), pairing to a new iPhone does not automatically set up cellular service. After the watch finishes restoring, open the Watch app on your iPhone, go to Cellular, and tap Set Up Cellular Plan. You will need to contact your carrier or use their app to add the watch to your account.

Some carriers let you set up cellular through the Watch app directly. Others require a phone call or a visit to a store. Check your carrier's website to see which method they use. Cellular setup is separate from watch pairing and can be done anytime after the watch is paired.

Frequently Asked Questions

Do I lose my health data and activity rings when I pair to a new phone?

No. Your health data, activity rings, and workout history are stored on the watch itself and in iCloud. When you restore from backup during pairing, all of this comes back automatically. You do not need to do anything extra to save it.

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

No. An Apple Watch can only be paired to one iPhone at a time. If you try to pair it to a second iPhone while it is still paired to the first, the pairing will fail. You must unpair from the first phone before pairing to the second.

What if I do not remember my Apple ID password?

If you cannot unpair normally because you do not have the old iPhone, you will need your Apple ID password to erase the watch remotely. Go to iforgot.apple.com on your new iPhone to reset your password before you start pairing. You can also call Apple Support for help.

How long does the whole process take?

Unpair takes 2 to 3 minutes. Pairing takes 1 to 2 minutes. Restoring the backup takes 5 to 10 minutes depending on how much data you have. Total time is usually 10 to 15 minutes if everything goes smoothly. If you have to restart devices or troubleshoot, add another 5 to 10 minutes.

Do I need to be on Wi-Fi to pair my watch?

Yes. Your watch needs Wi-Fi to pair to the new iPhone and to restore your backup. Make sure both devices are connected to the same Wi-Fi network before you start. If pairing keeps failing, try moving closer to your router or restarting your router.