Motorola ATRIX 4G MB860 Quad-band GSM Smartphone - Unlocked 2G Network - GSM 850 / 900 / 1800 / 1900 3G Network - HSDPA 850 / 1900 / 2100 OS - Android OS, v2.2 (Froyo), upgradable to v2.3 Chipset - Nvidia Tegra 2 AP20H CPU - Dual-core 1 GHz Cortex-A9