How to change the Apple ID associated with my IPhone?

My father gave me his IPhone.
How do I change the Apple ID on the phone from his to mine?

Have him go into erase all content and settings, it will require him to enter his password. At that point the phone is completely wiped and you will enter your ID and password to set it up. Then its officially yours.

He would have to go into Setting-Itunes and App store and have the phone forget the Apple ID. You might have to have him enter his password. Don't forget about icloud either.