T-Mobile G2X, the US version of the LG Optimus 2X dual core smartphone will debut on April 15th, if a recently leaked internal document is to be believed. At first April 20th was supposed to be the launch date, but only the T-Mobile Sidekick 4G will debut on that date. Also around the same time frame we’re expecting the LG G-Slate 3D tablet.

The handset will pack a 4 inch 480 x 800 pixel display, 8GB of storage, 512MB of RAM, an 8MP camera with 1080p video capture and Android 2.2, upgradeable to 2.3. There’s also a dual core 1GHz ARM Cortex A9 CPU under the hood, running the show.