Blackberry Q10 Unlocked Cellphone, 16GB, Black 2G: GSM 850 / 900 / 1800 / 1900 3G: 850 / 1900 / 2100 4G: LTE 700 / 850 / 1700 / 1900 3.1" Super AMOLED Capacitive Multi-Touchscreen + Full Physical QWERTY keyboard BlackBerry 10 (upgradable), Dual-Core 1.5 GHz Krait Processor, Chipset: Snapdragon S4, Adreno 225 Graphics 8 Megapixel Camera with Autofocus & LED Flash + Front-Facing 2 Megapixel Camera Internal Memory: 16GB, 2GB RAM + microSD Slot Expandable up to 64GB 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