Sony Ericsson C901 GreenHeart official Pictures. Sony Ericsson C901 GreenHeart is a Smartphone of sony. The Sony Ericsson C901 GreenHeart Phone. Announced May 2009. Features 2.2″ Display, 5 MP Primary Camera, 950 MAh Battery, 120 MB Storage. Sony Ericsson C901 GreenHeart price starts.