How can I change the email linked to FaceTime to setup my Apple Watch?

The FaceTime access request does still seem peculiar as that typically does not occur early in the pairing process.

Perhaps this is worth a try: On the iPhone being paired, set Settings > Apps > FaceTime > FaceTime = “off” and then start the pairing process from scratch again.

If I understand correctly, you are attempting to pair a brand new Apple Watch just removed from a factory sealed box to your iPhone which uses iOS 17 or later. Your iPhone is signed in to your Apple Account (formerly called Apple ID).

You begin the pairing process and you then see a message that literally references “email address for FaceTime”.

Somehow that scenario seems implausible.

Please provide specific details of exactly how this pairing attempt started, what you tried, what you saw, what worked, what failed, and the exact wording of error messages.

The implausibility occurs because being asked to “log into FaceTime” is not something that ordinarily occurs early in the pairing process. We still don’t know, for example, if you’re referring to a brand new Apple Watch you received in a factory sealed box. Nor do we know if the iPhone had been previously paired with a different Apple Watch.

Anyway, maybe this will help.

If you can't pair an Apple Watch with your iPhone - Apple Support

Alex5799xx wrote:

it has been used with 2 of my previous I phones

• As KiltedTim asked, what was the Apple Account associated with those two previous iPhones?
• Has the Apple Watch been unpaired from the previous iPhones?

The address should be the same as the Apple ID you’re logged into your phone with. Is it?