Turn on your Apple Watch by pressing and holding the side button
Bring your Apple Watch close to your iPhone
Make sure Bluetooth is turned on and your iPhone is connected to Wi-Fi or cellular
Open the Watch app on your iPhone
Tap Start Pairing
Hold your iPhone over the animation on your Apple Watch
Wait for the pairing process to complete
Choose Set Up as New Apple Watch or Restore from Backup
Sign in with your Apple ID if prompted
Follow the on-screen instructions to finish setup
Keep your iPhone and Apple Watch close together until pairing is complete