Tip: Unlocked for Worldwide use. Please ensure local area network is compatible. click here for Network Frequency of your country. Please check with your carrier/provider before purchasing this item. Notice: This Android/Windows device is designed to function specifically with the current Android/Windows OS installed on it. Any alterations such as upgrades, modding with custom ROMs, rooting or flashing the Android device with other firmware will automatically void the device's warranty. Cubot X17 5.0 inch 4G Smartphone Android 5.1 MTK6735 64bit Quad Core 1.3GHz Hotknot 3GB RAM 16GB ROM 8.0MP + 16.0MP Cameras Bluetooth 4.0 Main Features: Display: 5.0 inch 1920 x 1080 FHD Screen CPU: MTK6735 64bit Quad Core 1.3GHz GPU: Mali-T720 System: Android 5.1 RAM + ROM: 3GB RAM + 16GB ROM Camera: Dual Cameras, front camera 5.0MP camera ( interpolated 8.0MP ), back camera 13.0MP ( interpolated 16.0MP ) Sensor: Gravity Sensor, Accelerometer Sensor, Proximity Sensor, Ambient Light Sensor Bluetooth: 4.0 GPS: Yes Hotknot: You can exchange data with another phone which has this function OTA: Yes SIM Card: Dual SIM dual standby, one Nano SIM Card, one Micro SIM Card Network: 2G: GSM 850/900/1800/1900MHz 3G: WCDMA 900/2100MHz 4G: FDD-LTE 800/1800/2100/2600MHz SIM Card: Dual SIM dual standby, SIM1 is Nano SIM, SIM2 can be used in combination with a Micro SIM card or a TF card of up to 32GB. Note: Micro SIM Card 2 and Micro SD Card can't used at the same time, beacuse they use same space of card slot.