Word just hit via T-mobile’s Twitter account, that the Sidekick 4G will officially arrive in store and online on April 20th.  We already knew the price, which will be $99.99 on contract or $149.99 if you opt for a cheaper data plan.  T-Mobile also made it official that the LG G2x will hit stores 4/20 and arrive online 4/15.  It will cost $199.99 after a 2 year contract and $50 mail-in-rebate, or $499.99 without contract.

The Sidekick 4G features a 1 GHz Cortex A8 Hummingbird, a 3.5-inch touchscreen and Android 2.2.  The G2x will sport a 4-inch touchscreen, a 1GHz NVIDIA Tegra 2 dual-core processor, an 8 megapixel camera and 8GB of built-in storage.

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