Sony Ericsson WT18i official Pictures. Sony Ericsson WT18i is a Smartphone of sony. The Sony Ericsson WT18i Android Smartphone. Announced May 2011. Features 3.2″ Display, 3.15 MP Primary Camera, 1200 MAh Battery, 150 MB Storage, Scratch-resistant Glass. Sony Ericsson WT18i price starts.