Samsung Rugby 3 A997 GSM Unlocked Rugged Flip Phone - Gray/Black (International Version) ULTRA Ruggedized Phone - EXTREMELY STRONG IP67 certified - dust tight and water proof (up to 1m for 30 mins) MIL-STD-810G certified - salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant GSM 850 / 900 / 1800 / 1900; 3G HSDPA 850 / 1900 / 2100 2.4" TFT Display + Secondary external CSTN display; 3.15MP Camera (2048 x 1536 pixels) + Video Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.