How to pair I watch with new phone without old phone
How can I pair my iwatch to my new phone without my old phone?
Apple Watch
How can I pair my iwatch to my new phone without my old phone?
Apple Watch
From a web browser,sign in to iCloud.com with your Apple ID.
Go to Find iPhone.
Click All Devices at the top of the screen.
Click your Apple Watch.
Click Erase [device]. Select Next until the device is erased.
Click Remove from Account.
Then;
See the 'If you don't have your old iPhone or you erased it' section in:
How to pair your Apple Watch with a new iPhone - Apple Support
How to pair I watch with new phone without old phone