Pairing happens through the Watch app, not on the watch itself
To pair an Apple Watch with a new iPhone, you unlock the iPhone, open the Watch app, and follow the on-screen prompts to connect them. The watch and phone must be within a few feet of each other, and both need power. The entire process takes about five to ten minutes, though the watch will continue syncing data in the background for another hour or so after pairing completes.
If you are moving to a new iPhone from an old one, the Watch app will offer to restore your watch from a backup — this brings over your apps, settings, and data without you having to set everything up again. If you are pairing a watch for the first time, you will set it up from scratch.
Key Takeaways
- Start pairing on the iPhone by opening the Watch app and tapping "Start Pairing," not by doing anything on the watch itself.
- If you are switching iPhones, the Watch app will ask whether to restore from your old watch's backup or set up as new.
- Both devices need to be charged, within a few feet of each other, and connected to the same Wi-Fi network for pairing to work.
- After pairing completes, the watch will sync apps and data for up to an hour, so keep the devices close during that time.
- If pairing fails, restart both the watch and iPhone, then try again from the Watch app.
What you need before you start
Your iPhone must be running iOS 17.1 or later, and your Apple Watch must be running watchOS 10.1 or later. You can check the iPhone version in Settings > General > About, and the watch version in Watch app > General > About. If either device is older, update it first — updates happen through Settings on the iPhone and through the Watch app on the phone.
Both devices need at least 50 percent battery. Plug them in if they are lower. You will also need to be on the same Wi-Fi network, though the pairing itself uses Bluetooth to connect the two devices directly. Have your Apple ID password ready — you will need it during setup.
Step-by-step pairing for a new watch
Unlock your iPhone and open the Watch app (the icon looks like a small watch face). Tap "Start Pairing" at the bottom of the screen. The iPhone will ask you to hold your watch up to the iPhone camera so it can scan the watch's code. Position the watch so the camera can see the watch face clearly — this usually takes a few seconds.
Once the code scans, the iPhone will ask which wrist you wear the watch on and whether you want to use Siri. Choose your settings and tap Continue. You will then be asked to sign in with your Apple ID. Enter your password and follow the prompts to agree to the terms. The watch will begin pairing and syncing — this can take several minutes, and you will see a progress bar on both devices.
While the watch syncs, the iPhone may ask you to set up features like Siri, emergency contacts, and payment methods. You can do this now or skip it and set it up later in the Watch app. Once the progress bar finishes on both devices, pairing is complete.
Restoring from a backup when you switch iPhones
If you already have an Apple Watch paired to an old iPhone and you are moving to a new iPhone, the Watch app will ask whether to restore from backup or set up as new. Choose "Restore from Backup" to bring over your apps, watch faces, settings, and health data. This is faster than setting up from scratch and means you do not have to re-read apps or reconfigure everything.
The restore process works the same way as a fresh pairing — you still scan the watch code with the iPhone camera, and the watch still syncs for several minutes afterward. The difference is that your personal data and preferences come back automatically. If you choose "Set Up as New" instead, you will start with a blank watch and have to add apps and settings manually.
Troubleshooting when pairing fails
If the watch code will not scan, make sure the watch face is clean and the iPhone camera is not blocked. Try moving to a brighter location — the camera needs to see the code clearly. If the scan still fails, you can tap "Can't Scan?" and enter the watch's serial number manually instead. You can find the serial number on the original box or in Settings > General > About on the watch.
If the devices disconnect during pairing, restart both the watch and iPhone. On the watch, press and hold the side button until you see the power-off slider, then slide to turn it off. Wait a few seconds and press the side button again to turn it back on. On the iPhone, go to Settings > General > Shut Down, slide to power off, wait a few seconds, then press the side button to turn it back on. Once both devices are on, open the Watch app and try pairing again.
If pairing still fails after a restart, unpair the watch completely and try again. On the iPhone, open the Watch app, go to the My Watch tab, tap the watch at the top, tap the info icon, and select "Unpair Apple Watch." Confirm the action. Then start the pairing process from the beginning.
What happens after pairing is complete
Once pairing finishes, your watch will sync apps, photos, and data in the background for up to an hour. During this time, keep the watch and iPhone close together and on the same Wi-Fi network. You can use both devices normally, but syncing will be faster if you leave them near each other.
After syncing completes, your watch will stay connected to the iPhone through Bluetooth when you are nearby, and through Wi-Fi when you are away from the phone. You can check the connection status by swiping up on the watch face — if you see a green phone icon, the watch is connected to the iPhone. A red icon means the connection is lost, though the watch will still track activity and store data until the connection returns.
Moving your watch to a different iPhone later
If you want to pair the same watch to a different iPhone in the future, unpair it from the current iPhone first. Open the Watch app, go to My Watch, tap the watch at the top, tap the info icon, and select "Unpair Apple Watch." The watch will erase and restart. Then on the new iPhone, open the Watch app and start pairing as if it were a new watch — you can restore from your backup if you want to keep your settings and data.
You cannot pair one watch to two iPhones at the same time. The watch will always sync with whichever iPhone it is currently paired to. If you switch between iPhones regularly, you will need to unpair and re-pair each time.
Frequently Asked Questions
Do I need cellular service on the watch to pair it?
No. Pairing works with Bluetooth and Wi-Fi alone. If your watch has cellular capability and you want to use it, you can set that up after pairing is complete through the Watch app on your iPhone.
What if I do not have the original box or serial number?
You can find the serial number on the watch itself. Go to Settings > General > About on the watch and scroll down — the serial number is listed there. You can also find it in the Watch app on your iPhone after pairing, or by visiting Apple's website and signing in with your Apple ID.
Can I pair a watch that is already paired to someone else's iPhone?
No. The watch must be unpaired from the previous iPhone first. If you do not have access to that iPhone, you can erase the watch by holding the side button until the power-off slider appears, then swiping to power off. Hold the side button again until you see the Apple logo and "Erase all content and settings" appears. This wipes the watch completely and lets you pair it to a new iPhone.
How long does syncing take after pairing?
Initial syncing usually takes 30 minutes to an hour, depending on how many apps you have and how much data the watch needs to read. You can use both devices during this time, but syncing will be faster if you keep them close together. After the first sync, future syncing happens automatically whenever the watch and iPhone are near each other.