Dual Nano sim + SD Slot 4G: LTE 4G: LTE TDD B40, B41 4G: LTE FDD B1, B3, B5, B8 3G: WCDMA:1 2 5 8 2G: GSM: B2 B3 B5 B8 with 6.67" FHD+ AMOLED DotDisplay Refresh rate: Up to 120Hz Contrast ratio: 4,500,000:1 Technology: 1200nits brightness, SGS eye care, Sunlight Mode, Reading Mode, Contrast ratio: 4500000:1 DCI P3: 100% (typical)