BlackBerry Classic Q20 Unlocked GSM 4G LTE - SQC100-4 - Keyboard Smartphone w/ 8MP Camera - Black (Certified Refurbished) This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty, and may arrive in a generic box. Only select sellers who maintain a high performance bar may offer Certified Refurbished products on Amazon.com 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 all GSM carriers in US and International). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin. 2G: GSM 850 / 900 / 1800 / 1900, 3G: HSDPA 850 / 1700 / 1900 / 2100, 4G: LTE Bands 1, 2/25, 4, 5, 7, 13, 17 (2100/1900/AWS/850/2600/700/700 MHz) BlackBerry 10.3.1 OS (upgradable), Dual-Core 1.5 GHz Krait Processor, Chipset: Qualcomm MSM896 Snapdragon, Adreno 225 Graphics 8 Megapixel Camera (3264 x 2448 pixels) w/ Autofocus & LED Flash + Front-Facing 2 Megapixel Camera Internal Memory: 16GB, 2GB RAM, microSD Slot Expandable up to 128GB