MLAIS M52 Red Note 5.5 Inch HD Touch Screen OGS MTK6752 8-Core 64-bit Android 4.4 4G LTE Phone 13MP CAM 2GB RAM 16GB ROM(Red) 64-bit, Faster than ever MTK6752 deliver high-end performance with Cortex-A53 64-bit octa core processor at 1.7GHz higher performance with lower power consumption and efficient compatibility for legacy 32-bit applications. It supports Cat 4 LTE (FDD/TDD), DC HSPA+ and H.265 Ultra HD video playback. 4G/LTE is limited to carrier's support, please contact your carrier for more information. 4G HSPA+ up to 21 Mbps 850/900/1900/2100: Nationwide AT&T: Cricket Wireless, Straight Talk, Net10, H20 Wireless, 420 Wireless, Black Wireless, Consumer Cellular, Pure Talk USA, Red Pocket, Telcel America. GSM Quad Band 4G HSPA+ (850/900/1900/2100): 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.