Apart from getting
apps from the App Store, you cannot access many other Apple services and
functions without your own  Apple ID . So it is recommended to remove
the old  Apple ID  from your second-hand iPhone. If you do not
have the  password for the Apple ID , how do you completely remove it from your iPhone? Listed below
are some powerful methods for escaping trouble.

Learn
more here: https://www.soldrit.com/blog/how-to-remove-apple-id-from-iphone-without-password/