Unable to pair child's Watch with new iCloud ID
I'm trying to pair a new watch for my 2nd child. during the setup process it asked me to log in to her iCloud ID. I just created a new ID for her in family share but watch keep showing unable to sync and will need to delete all data on iCloud ID. Which is ok by us as there are no data in this cloud. After I select 'Delete iCloud data' still the phone show cold not sign in, there is a problem connecting to the server.
[Re-Titled by Moderator]
Apple Watch SE