”An Apple ID is the account you use to access Apple services like iCloud, the App Store, the iTunes Store, Apple Music, and more. It includes the email address and password that you use to sign in”
”Use a web browser
If you need to create an Apple ID on your device — including your Android device or Apple TV — you can usually follow the steps provided when you set up your device or Apple service for the first time”
I would guess by keeping their Apple ID. AFAIK, you don’t have to buy anything from Apple to get one.
https://support.apple.com/en-us/HT204316:
”An Apple ID is the account you use to access Apple services like iCloud, the App Store, the iTunes Store, Apple Music, and more. It includes the email address and password that you use to sign in”
https://support.apple.com/en-us/HT204316#web:
”Use a web browser If you need to create an Apple ID on your device — including your Android device or Apple TV — you can usually follow the steps provided when you set up your device or Apple service for the first time”