Transferring my old phone to my son - Apple IDs wont decouple from each other
My son had an Iphone and it was damaged - so I have given him my old iPhone 11. I am trying to take all my Apple ID data off that phone - set him up a new one, and decouple that phone from my Apple ID.
I have tried everything suggested but I keep going around in circles - if I change the e mail on one phone it effects the other's apple ID and same with telephone number.
I feel I am confusing both phones - I just want him to have my old phone and his own Apple ID, and I carry on using my new phone with my Apple ID - at the minute the two are intertwined.
It's very frustrating for something that should be so easy.
Is there a away I can cancel everything I've set up for him and start again, making sure my Apple ID is as it was.
iPhone 11, iOS 15