If you have not previously powered on your Apple Watch, press and hold the Side button until the Apple logo is displayed.
Tap the Watch app on your iPhone.
A pairing animation should appear on the Watch.
If you see an 'Activation Lock' screen, your Apple Watch is linked to an Apple ID; enter your login info to continue.
Tap Start Pairing on the Watch and the iPhone.
Center the iPhone over the pairing animation on the Watch until 'Your Apple Watch is Paired' is displayed.
If the pairing animation isn't displayed or the iPhone doesn't read it, tap Pair Apple Watch manually.
Once you receive confirmation of successful pairing, tap Set Up Apple Watch.
If the watch has been set up before, tap Restore from Backup then follow the onscreen steps.
On the iPhone, pick the wrist (left or right) you wear the watch on.
Based on this, you must also pick the 'Digital Crown Orientation' (left or right side).
To continue, read the Terms and Conditions then tap Agree.
From your iPhone, choose if you want the Watch to use Location Services (Route Tracking) and Siri.
Enable Location Services if you want your Apple Watch to track your workout routes.
Tap OK to enable your Watch to share settings with your iPhone.
These settings transfer from the Watch to the iPhone and back. If a setting for these services is changed on one device, it applies to both devices.
Location Services & Find My iPhone
On the iPhone, choose whether or not to make a passcode for the Watch.
A passcode is required for features like Apple Pay.
Create a Passcode
Make a passcode using the Watch.
Select an option to choose whether the Watch unlocks with the iPhone.
Add a Long Passcode
Choose an option to sync the iPhone apps that work with the Watch:
Only the apps that are compatible with the Watch are synced.
Keep the Watch and the iPhone close together until you receive the alert that syncing is complete then tap Continue or OK if prompted.
Tap OK to open the Watch app.
For versions of the Watch with Cellular (LTE), you must pair and share a number with a compatible iPhone. If you haven't set up or are having issues activating NumberShare, view these steps.