BLU Win JR W410u Unlocked GSM Windows 8.1 Smartphone, Yellow (Certified Refurbished) This Certified Refurbished product is factory refurbished, shows limited or no wear, and includes a 90 day warranty 2G: GSM 850 / 900 / 1800 / 1900 (SIM 1 & SIM 2) 3G/HSPA+: 850 / 1700 / 1900 4-inch Capacitive Multi-Touchscreen 5 Megapixel Camera (2592 x 1944 pixels) w/ Autofocus & LED Flash+ Front-Facing VGA Camera + Video Microsoft Windows Phone 8.1 OS, 1.2GHz Quad Core Processor, Chipset: Qualcomm Snapdragon 200, Adreno 302 Graphics Internal Memory: 4GB ROM, 512MB RAM + microSD Slot Expandable up to 32GB