HTC 8X 16GB Unlocked Windows Phone w/ 8MP Camera, 4.3" HD Display and Beats Audio - Blue GSM 850/900/1800/1900; HSDPA 850/900/1900/2100 S-LCD2 capacitive touchscreen, 4.3-Inch 8 MP Primary Camera, 3264 x 2448 pixels, autofocus, LED flash; 2.1MP Secondary Camera; Video: 1080p@30fps, continuous autofocus, video light OS: Microsoft Windows Phone 8; CPU Dual-core 1.5 GHz Krait; Chipset: Qualcomm MSM8960 Snapdragon; Internal Memory: 16 GB storage, 1 GB RAM Beats Audio sound enhancement; Browser: HTML5; GPS with A-GPS support and GLONASS; Wi-Fi 802.11 a/b/g/n, dual-band; Bluetooth v2.1 with A2DP, EDR; NFC 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.