How do i change my alternate email id?
How do I delete/change an alternate id in icloud?
To change your iCloud ID and/or password, go to Settings>iCloud, tap Delete Account, then sign back in with your updated credentials. Deleting the account will only delete the account and any iCloud data from your device, not from iCloud. Provided you are signing back into the same account and not changing accounts, your data will be synced back to your device when you sign back in.
