To unpair a broken Apple Watch from my iPhone, do I have to use the Apple ID that was used to setup the Apple Watch? (I have an old Apple ID, but can’t remember the password)
Apple Watch Series 3
Yes, you need to remove it from the iCloud account the watch is tied to. If you don't remember the password to that account see this --> If you forgot your Apple ID password - Apple Support
Yes, you need to remove it from the iCloud account the watch is tied to. If you don't remember the password to that account see this --> If you forgot your Apple ID password - Apple Support
Unpairing broken Apple Watch that does not show up in All Devices on iCloud
