U.S.A. Users : Only Works on Tmobile / Mint / Tello or any under Tmobile Network 4G VoLTE Worldwide Unlocked Dual Nano sim . FCC ID: 2AFZZRA42L 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 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) Qualcomm Snapdragon 4 Gen 1 CPU: 2X Cortex-A78 @ 2.0GHz ; 6X Cortex-A55 @ 1.8GHz GPU : Adreno 619 Bluetooth 5.2 Wi-Fi Protocol: 802.11a/b/g/n/ac GPS/AGPS, Glonass Dual speakers 3.5mm headphone jack Hi-Res Audio Proximity sensor | Ambient light sensor | Accelerometer | Electronic compass | IR blaster |Gyroscopecertification 50MP Main Camera (f/1.8) 8MP Ultra-Wide Camera (f/2.2) 2MP Macro Camera (f/2.4) LED flash / Front: 13 MP, (wide), 1/3.06", 1.0µm Manufacturer : Xiaomi