Keep your iPhone and Apple Watch close together
Open the Watch app on your iPhone
Tap All Watches
Tap the info button next to your Apple Watch
Tap Unpair Apple Watch
Enter your Apple ID password if prompted
Wait for the unpairing process to finish
Turn your Apple Watch back on
Bring the Apple Watch near your iPhone
Follow the on-screen pairing instructions
Tap Set Up for Myself or Set Up for a Family Member
Hold the iPhone over the Apple Watch animation
Choose Restore from Backup if available
Sign in with your Apple ID if prompted
Complete the setup steps on your iPhone and Apple Watch