HTC One X with Beats Audio Quad-Band GSM Smartphone White - Unlocked 2G Network - GSM 850 / 900 / 1800 / 1900 3G Network - HSDPA 850 / 900 / 1900 / 2100 OS - Android v4.0 with HTC Sense 4.0 SIM - Micro-SIM Chipset - Nvidia Tegra 3