Make sure your Apple Watch and iPhone are charged and have Bluetooth enabled
Place your iPhone near your Apple Watch
Turn on your Apple Watch
On your iPhone, open the Apple Watch app
Tap Start Pairing
Hold your iPhone so the camera can view the animation on your Apple Watch
Follow the on-screen prompts to complete setup
Choose Set Up as New or Restore from Backup
Sign in with your Apple ID if prompted
Agree to terms and conditions
Select your preferred settings (passcode, Apple Pay, analytics, etc.)
Wait for the sync to finish
Keep the iPhone near the watch until setup completes
Confirm pairing in the Apple Watch app (My Watch)