I have read on  that Fairphone 3 comes with Android 10 installed on it. I would be migrating from an older device with Android 8.1 and I’d like to know if it would be possible to use
adb backup to restore some apps’ data (backed-up from Android 8.1) to the new Fairphone with Android 10. See reference .
And I’d like to ask another question: Is it mandatory to create a user account on  to buy a new Fairphone or can I checkout just submitting my data without creating an account?