Unpairing Apple Watch
How do I unpair my Apple Watch from my old Apple ID if I don’t have access to old Id or phone?
How do I unpair my Apple Watch from my old Apple ID if I don’t have access to old Id or phone?
Read here and tap on "If you don't have your old phone";
How to pair your Apple Watch with a new iPhone – Apple Support
Read here and tap on "If you don't have your old phone";
How to pair your Apple Watch with a new iPhone – Apple Support
Unpairing Apple Watch