Turn on your Apple Watch and keep it near your iPhone
Make sure Bluetooth is on and your iPhone is connected to Wi-Fi or cellular
Open the Apple Watch app on your iPhone
Tap Start Pairing
Hold your iPhone over the animation on the Apple Watch
Wait for the pairing to complete
Choose Set Up for Myself or Set Up for a Family Member
Follow the on-screen instructions to sign in with your Apple ID
Create or enter your passcode
Choose your settings and preferences
Wait for sync and setup to finish
Keep both devices close until pairing is complete