Switch to another Apple ID
I bought my wife an Apple iPhone XS Max and set it up with a new iCloud account. She didn't like it so I got her an Android phone.
My question is how do I switch the iPhone from her iCloud account to mine without having to erase everything?
When I try to edit "REACHABLE AT" in the phone's Settings/Apple ID/Name, Phone Numbers, Email
by adding my Apple ID in order to then erase hers I get this:
When I go to my iCloud for Windows on my PC click on Account details:
Then click on manage apple id:
I get this which shows that my Apple ID that I am trying to switch to on her iPhone is listed as one of the devices already associated with my Apple ID?
[Image Edited by Moderator to Remove Personal Information]