T-Mobile earlier this week on Monday announced the company’s second Android phone, the MyTouch 3G,  based on the HTC Magic platform. It will be available in 3 colors: White, Black and Merlot. It features a 3.2", 320×480 touch screen, 3.2-megapixal camera, MicroSD memory card slot, and built-in video recording and playback capabilities. The phone connects to the Internet via T-Mobile’s 2G and 3G networks, foreign 2G or 3G networks or Wi-Fi.  The myTouch 3G can be pre-ordered by existing T-Mobile customers starting July 8th for $199.99. Shipments will go …