Had this problem with my Apple watch 4. Trying to pair to my iphone12. Don't think phone or watch series made a difference. DIL came to help. We tried all these suggestions. No telling what state everything else was in at the time but when she changed the setting on the watch and phone the Afghanistan/English the update finally started downloading, however it would not install to the watch until the phone was updated to the most recent IOS which at this time is 15.1. Meanwhile I was updating my iphone12 to 15.1. When that was finished she simply attempted to pair and it immediately started the update. Appears it was important to be sure you have the most recent IOS installed.
Kathis
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