My watch won’t. Update
So my watch won’t update. I have tried so many times and when it does update it doesn’t pair.
Without any other info like error messages, etc. see the '' section in:
Update your Apple Watch - Apple Support
If your Apple Watch displays a red ! after a software update, try this:
If you see a red "!" on your Apple Watch - Apple Support
If the update fails, see fireyjack's reply to:
apple watch 3 series won't update , w… - Apple Community
I was given a 7000 series Apple Watch - Apple Community