The basic process: unpair first, then pair to the new phone

To move your Apple Watch to a new iPhone, you must unpair it from your old phone before pairing it with the new one. This erases the watch's settings and data, then lets you set it up fresh on the new device. The entire process takes about 15 to 20 minutes if your new phone is already set up and connected to Wi-Fi.

Apple Watch and iPhone communicate through a connection called pairing. A watch can only be paired to one phone at a time. If you try to pair it to a second phone without unpairing from the first, the watch will reject the connection. Unpairing breaks that link and prepares the watch to accept a new one.

Key Takeaways

  • You must unpair your Apple Watch from your old iPhone before it will connect to a new one, which erases all watch data.
  • Unpairing happens in the Watch app on your old phone, not on the watch itself — if you no longer have the old phone, you can unpair remotely through iCloud.
  • After unpairing, your new iPhone will detect the watch automatically when you bring them close together and open the Watch app.
  • The watch will restore from a backup during setup if you saved one, returning your apps, settings, and data to the state they were in before unpairing.
  • If your new phone is a different size or model than your old one, some watch bands may not fit — check compatibility before you start.

Unpairing from your old iPhone

Open the Watch app on your old iPhone. Tap the My Watch tab at the bottom of the screen, then tap your watch name at the top. Scroll down and tap Unpair Apple Watch. You will see a warning that this action erases all data on the watch — this is normal and expected. Tap Unpair again to confirm.

The watch will show a loading screen for a few minutes while it erases. Once it finishes, the watch will restart and show the Apple logo, then a pairing screen with animated circles. This means unpairing worked. Leave the watch on this screen — do not try to set it up yet.

If you no longer have your old iPhone, you can unpair remotely. Go to iCloud.com on any computer or phone, sign in with your Apple ID, open Find My, select Devices, choose your old iPhone, and tap Remove from Account. This removes the pairing link without needing the old phone in your hands. The watch will not erase automatically, so you will need to erase it manually: hold down the side button on the watch until the power-off slider appears, swipe it to turn off the watch, then hold the side button again until you see the pairing screen.

Pairing to your new iPhone

Make sure your new iPhone is set up, unlocked, and connected to Wi-Fi. Bring the watch close to the phone — within a few inches. Open the Watch app on your new iPhone and tap Start Pairing. The phone will search for nearby watches.

When your watch appears in the list, tap it. The phone will show a pairing code and ask you to hold the watch up to the iPhone camera. Point the watch's camera at the code on the phone screen until the phone beeps and shows a checkmark. This step confirms that the watch and phone are in the same room and belong to the same person.

Next, the phone will ask you to sign in with your Apple ID. Use the same Apple ID you used on your old iPhone — this is how the watch knows to restore your backup. The phone will then read your apps, settings, and data from iCloud. This step can take 5 to 10 minutes depending on how much data you have and how fast your Wi-Fi is. Do not put the phone or watch to sleep during this time.

What happens if you do not have a backup

If you did not save a backup before unpairing, or if you are using a different Apple ID than before, the watch will set up as new. This means you will start with a blank watch and have to add your apps, set your preferences, and re-enter any passwords one by one. The watch will still work — it just takes longer to get back to where you were.

To avoid this in the future, make sure you are signed in with the same Apple ID on both your old and new iPhones before you unpair. The Watch app automatically saves a backup to iCloud every time you unpair, as long as you are signed in.

Troubleshooting when pairing fails

If the pairing code does not scan, make sure the watch camera lens is clean and the phone screen is bright. Try moving the watch closer or farther from the phone — usually 4 to 6 inches works best. If the code still will not scan, tap Can't Scan? and enter the code manually instead.

If the watch keeps disconnecting during the data restore, check that both devices are still connected to Wi-Fi and that they are close together. If the connection drops, the restore will pause and resume when the connection comes back. If it fails completely, unpair again and start over — the backup is still saved, so you will not lose anything.

If your new iPhone does not see the watch at all, restart both devices. Turn off the iPhone completely, wait 10 seconds, and turn it back on. Then hold the side button on the watch until the power-off slider appears, swipe to turn it off, wait 10 seconds, and hold the side button again until the Apple logo shows. Once both devices are back on, try pairing again.

Band compatibility with different iPhone models

Apple Watch bands fit into a slot on the watch body. The slot size changed between watch generations — a band made for a Series 7 watch will not fit a Series 3, for example. If your new phone is the same generation as your old one, your bands will still fit. If you upgraded to a newer watch model at the same time as your new phone, check the band compatibility before you buy new ones.

You can find your watch model by opening the Watch app on your iPhone, tapping My Watch, then General, then About. Look for the line that says Model. Compare this to the model number printed on any band you want to use — the band packaging or Apple's website will tell you which watch models it fits.

Frequently Asked Questions

Do I lose all my data when I unpair?

Yes, unpairing erases everything on the watch itself. However, if you are signed in with your Apple ID, a backup is saved to iCloud automatically. When you pair to your new phone, the watch restores from that backup and you get your apps, settings, and data back. If you unpair without being signed in to iCloud, the backup is not saved and you will have to set up the watch from scratch.

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

No. A watch can only be paired to one iPhone at a time. If you try to pair it to a second phone, the watch will reject the connection. You must unpair from the first phone before pairing to the second.

What if I lost my old iPhone and cannot unpair?

You can unpair remotely through iCloud.com without the old phone. Sign in with your Apple ID, go to Find My, select your old iPhone, and tap Remove from Account. Then manually erase the watch by holding the side button until the power-off slider appears, swiping to turn it off, and holding the side button again until you see the pairing screen. After that, you can pair to your new phone normally.

How long does the whole process take?

Unpairing takes about 2 to 3 minutes. Pairing and restoring data takes 5 to 10 minutes depending on how much data you have. The entire process from start to finish is usually 15 to 20 minutes.

Will my watch apps come back after I pair to the new phone?

Yes, if you restore from a backup. The watch will re-read all the apps you had before unpairing. If you set up as a new watch instead of restoring, you will have to read your apps again manually through the App Store on the watch or the Watch app on your phone.