Samsung today announced the Rugby Smart for AT&T. Like previous Rugby phones, this model is rugged, including being waterproof for up to 30 minutes under three feet of water. While previous Rugby models were feature phones, the Rugby Smart runs Android 2.3 and sports a 3.7-inch Super AMOLED display. Other features include HSPA+ data, 5-megapixel camera, front camera, and memory card slot. A 1650 mAh battery provides up to eight hours of talk time. The Rugby Smart goes on sale with AT&T on March 4 for $100 with two-year contract and data plan.