If like me for some reason you have to change your AppleID email address you could well discover that this is an absolute nightmare.
To do this you need to go to : https://appleid.apple.com/
And then you click on ‘Manage Your Apple ID.’
From here you can ‘Edit your Apple ID and Primary Email Address.’
It should be a case of changing your email address and saving it. For me and many others though that is not the case.
– Perform a FULL BACKUP using both iCloud and a physical backup on iTunes –