The T-Mobile Sidekick 4G was announced in 2011, March. Released 2011, April 20 With 3.5 inches, 34.9 cm2 (~45.0% screen-to-body ratio) TFT, Powered by Hummingbird and running Android 2.2 (Froyo), the device delivered smooth performance and multitasking capabilities. Its 3.15 MP, AF rear camera captured crisp photos and 480p@30fps video, while the Removable Li-Ion 1500 mAh battery ensured long-lasting usage.