RadioShack announced in a tweet, that the SideKick 4G will be arriving at RadioShack on April 20. T-Mobile did not unveil specific details on when it would make the device available for its users, but RadioShack notes that it would have it available on that day. The mobile phone sports a special user interface, the so called Sidekick UI, and also includes video call support, complemented by a front-facing camera, along with dedicated emoticon and voice control keys.The new Sidekick 4G is exclusively for T-Mobile USA customers and maintains the heritage of the Sidekick, with its spring-loaded screen and five-row keyboard.

As a reminder the Sidekick 4G features a 3.5 inch Super AMOLED touchscreen display, plus a slide out QWERTY Keyboard, and it comes with Google Android 2.2 Froyo and a custom TouchWiz user interface. Other specifications on the T-Mobile Sidekick 4G include 4G HSPA+ connectivity, a front facing VGA camera for video chat and a rear facing three megapixel camera.Pricing the handset under $100 ($99 after $50 mail-in rebate)