HTC One X+ 64GB Unlocked GSM 4G LTE Android 4.1 Quad-Core Smartphone w/ 8MP Camera - Black 2G: GSM 850 / 900 / 1800 / 1900, 3G: HSDPA 850 / 900 / 1900 / 2100, 4G: LTE 700 MHz Class 17 / 1700 / 2100 4.7" Super LCD2 Capacitive Multi-Touchscreen w/ Protective Corning Gorilla Glass 2 Android v4.1.1 (Jelly Bean), Quad-Core 1.7 GHz Processor, Chipset: NVIDIA Tegra 3 AP37, ULP GeForce 2 Graphics 8 Megapixel Camera (3264 x 2448 pixels) w/ Autofocus & LED Flash+ Front-Facing 1.6 Megapixel Camera Internal Memory: 64GB, 1GB RAM 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.