On Sunday evening, Samsung announced several new smartphone models. The most important may turn out to be Samsung Galaxy Star 2, which shows just how deeply into the budget market Samsung intends to burrow. This radically low-end new cheapie smartphone doesn’t even have 3G support and the camera quality is mere 2 megapixels. The display is a skimpy 3.5 inches. We’re talking specs from 2007 here, although the Galaxy Star 2 does offer Wi-Fi N, GPS and Bluetooth support. There are several reasons why Samsung has now a lot riding on ultra-cheap smartphones. Samsung’s mobile phone volume growth has suddenly screeched to a halt. The company delivered such strong unit growth for so long that losing momentum must be disorienting and