T-Mobile’s myTouch3G is now officially available for pre-order. The catch you ask? You must be a preexisting T-Mobile customer with a post paid account in good standing – sorry no prepaid customers allowed. As previously reported, expect to drop $199.99 after a 2-year contract signing and you’re guaranteed delivery by August 5th. The existing customer pre-order scheme ends July 28th, which is when the phone should become available for pre-order to the common folk.