HTC One M8 32GB Unlocked GSM -Windows Version- Quad-Core, Dual-Frontal Stereo Speakers, Dual-Camera UltraPixel Smartphone - Gunmetal Grey (Certified Refurbished) 3G: HSDPA 850 / 900 / 1900 / 2100, CDMA: CDMA2000 1xEV-DO, 4G: LTE band 3(1800), 4(1700/2100), 7(2600), 13(700) - LTE coverage limited on GSM networks 5-inch Super LCD3 Multi-Touchscreen w/ HTC Sense UI v6 and Protective Corning Gorilla Glass 3 Windows Operating System, Quad-core 2.3 GHz Krait 400 Processor, Chipset: Qualcomm MSM8974AB Snapdragon 801 HTC UltraPixel Camera with BSI sensor; 2.0 m pixel size; f/2.0 aperture; 29mm lens; Flash + Front-Facing 5MP camera; captures Full HD 1080p video Internal Memory: 32GB, 2GB RAM + microSD Slot Expandable up to 128GB