Facial animation technology is essential for the implementation of personified virtual characters capable of reproducing the style of communication that humans are accustomed to, based on verbal and non-verbal communication. Depending on the application, these virtual characters can play varied roles like instructors, assistants, avatars, presenters or sellers. Several hardware/software plataforms have been used to implement such characters including personal computers, Web, game consoles and mobile devices. The present work had as objective to study and to deepen the knowledge associated to the implementation of facial animation systems in mobile devices. In order to do so, it proposed to migrate to the mobile plataform the image-based facial animation system AnimaFace 2D developed in the Department of Computer Engineering and Industrial Automation of the Faculty of Eletrical Engeneering and Computing of UNICAMP.