Credits: Apple Support yt channel

Open Watch app > My Watch > iCloud Backup to preserve settings, apps, and health data securely.

Open Apple Watch app on old iPhone > My Watch > Unpair Apple Watch

Confirm and proceed, understanding this erases all data on your Apple Watch

Confirm and proceed, understanding this erases all data on your Apple Watch

Hold side button until Apple logo appears.

Hold side button until Apple logo appears.

Follow on-screen instructions; enter Apple ID password if prompted.

Place new iPhone close; pairing screen appears

During setup, choose 'Restore from Backup' for a seamless transfer of apps and data.

Confirm Bluetooth is on in settings on both devices.

Restart Apple Watch and iPhone if facing connectivity issues.