BLU Win HD 5-Inch Windows Phone 8.1, 8MP Camera Unlocked Cell Phones - Yellow 8GB Internal Storage 1GB RAM with Micro SD Slot up to 32GB 5.0" Display (720x1280): 8MP Autofocus Camera with LED Flash,Video Recording, 2MP front camera Qualcomm Snapdragon 200 1.2 GHz Quad-Core, Adreno 302 GPU, Windows 8.1 OS 3G/4G HSPA + 42Mbps 850/1700/1900: Nationwide AT&T: Cricket Wireless, Straight Talk, Net10, H20 Wireless, 420 Wireless, Black Wireless, Consumer Cellular, Pure TalkUSA, Red Pocket, Telcel America. T-Mobile: MetroPCS, Lyca, Speedtalk, Go Smart, Simple Mobile, Net10, Straight Talk, Solavei, Ultra Mobile, Telcel America, Walmart Family Mobile. 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. 8 GB Storage Capacity (Estimated Free Space 6 GB)