T-Mobile Sidekick LX 2009 official Pictures. T-Mobile Sidekick LX 2009 is a Smartphone of t_mobile. The T-Mobile Sidekick LX 2009 Phone. Announced Apr 2009. Features 3.2″ Display, 3.15 MP Primary Camera, 1250 MAh Battery. T-Mobile Sidekick LX 2009 price starts.