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.
Oeina XP7711 5.0 inch Android 5.1 3G Smartphone MTK6580 Quad Core 1.2GHz 1GB RAM 8GB ROM A-GPS Bluetooth 4.0 Gravity Sensor Main Features: Display: 5.0 inch screen CPU: MTK6580 Quad Core 1.2GHz System: Android 5.1 RAM + ROM:1GB RAM+8GB ROM Camera:Back camera 2.0MP + front camera 2.0MP Bluetooth:4.0 Navigation: GPS, A-GPS Sensor: G-sensor, Proximity sensor, Accelerometer SIM Card: Dual SIM dual standby, dual micro SIM cards Network: 2G: GSM 850/900/1800/1900MHz 3G: WCDMA 850/2100MHz