Jose has lost some of his iTunes music from his mobile phone. Leo says that while iTunes says he's responsible for it, he can ask them to restore them and chances are they will do it. But he also has an Android phone right now. So how can he move them over? Leo says that Apple uses AAC, a standard form of music encoding.
Once he has his music, then he can use a third party solution like DoubleTwist, which can move them over for him. Then he should back up his music!