BLU Vivo Air Unlocked Cellphone, 16GB, White/Gold The slimmest Smartphone in the world at only 5.1 mm, made entirely out of solid aluminum and glass with remarkable 4.8 inch HD Super Amoled display and Octa-Core CPU 4.8" Super AMOLED LCD with Corning Gorilla Glass 3 protection on front and back: 8MP Camera with LED Flash with HD video recording (1080p), 5MP Front Camera 16GB internal with 1GB RAM, MediaTek Octa-Core 1.7GHz Processor with MALI 450 GPU, Android 4.4 Kit Kat GSM Quad Band 4G HSPA+ (850/1900/2100): US Compatibility: AT&T, T-Mobile, Cricket, MetroPCS, and others, including most 3G UMTS/HSPA+ Networks when roaming outside the US 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.