Samsung Galaxy S4 16GB (SGH-I337) 4G LTE White Frost - AT&T 13.0MP Back Camera - 2.0MP Front Camera - 4x Digital Optical Zoom Oversized 5.0 Inch Touchscreen Display 1080 x 1920 pixels - Weight 4.59 oz. - Product Dimensions (Inches) 5.38" x 2.74" x 0.31" 1.9GHz Quad Core Processor LTE: Bands 1/2/4/5/7/17; HSPA+/UMTS: 850/1900/2100MHz; GSM: 850/900/1800/1900MHz 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.