BLU Studio C 5.0-Inch Smartphone with Android Lollipop OS - Unlocked (Green) MediaTek Quad core 1.3 GHz processor with ARM Mali-400 GPU 8GB Internal Memory 1GB RAM Micro SD up to 64GB 8MP Autofocus Main Camera with Led Flash and 2MP Front Camera Super Battery 3000 mAh 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