US Compatibility: All GSM Networks including AT&T and T-Mobile * Optimized to work with 3G (UMTS/HSPA+) networks when operating inside the US. 3G coverage may be limited when roaming outside the US. * 4.5 inch 720p HD TFT display * Quad-core 1.2GHz processor with 450MHz graphics processor * 5MP rear camera, plus front facing camera