ASUS ZenFone Zoom Unlocked Cellphone, 64GB, Black (U.S. Warranty) Worlds thinnest 3X optical-zoom smartphone with an innovative10-element HOYA lens arrangement for crisp detail  and up to 12x total magnification. 5.5-inch IPS full HD display (Gorilla Glass 4); 13MP rear 3X optical camera and 5MP front camera. 64-bit Intel 2.3GHz Quad Core processor with 4GB RAM and 64GB storage. ZenEar and matching leather strap included Compatible with GSM Networks including AT&T, T-Mobile and cellular network providers utilizing GSM network such as: Straight Talk, Walmart Family Mobile, MetroPCS, Simple Mobile, Brightspot, Net10, h20 Wireless, and Cricket Wireless. GSM/EDGE (850, 900, 1800, 1900 MHz), UMTS/HSPA+/DC-HSDPA (850, 900, 1700/2100, 1900, 2100 MHz), LTE (Bands 1, 2, 3, 4, 5, 7, 8, 17, 20). Model ZX551ML-23-4G64G-BK; compatible with Micro SIM Cards