To pair the Watch to your new iPhone, follow these steps: Erase your Apple Watch. On the Watch, go to Settings > General > ...

If the backup is more than a day or two old, take an extra few minutes to create a new backup. To do so, open the Settings ...

For example, you can't come from iOS 14.2 to a new iPhone with iOS 14.1 with the transfer method, but you can set it up as a new iPhone. You can also back up your old phone with iCloud and set up ...