We’re excited to announce that Sony Ericsson’s Xperia PLAY 4G will arrive in AT&T stores and online on September 18 for $49.99 with a two-year agreement. The AT&T smartphone package is complete with bonus accessories including the Sony Ericsson Multimedia Dock DK300 and MC100 music cable. The Xperia PLAY 4G runs on Android 2.3.3 (Gingerbread) platform and features a brilliant 4” 480 x 854 screen and stereo speakers. In addition, the device is pre-loaded with seven games, some of which are exclusive, at no additional cost including:   ∙                    Dungeon Defenders™ Second Wave by Trendy Entertainment ∙                    Asphalt™ 6 Adrenaline by Gameloft ∙                    Star Battalion by Gameloft ∙                    Madden NFL™…