... Phone JIAYU G4 Highlights:Type: Smart phoneColor: WhiteOS: Android 4.1CPU: MTK6589 Cortex A7 quad core 1.2GHzGPU: ... Excel, PPT E-book format: TXTLive wallpaper support: Yes Games: Android APK and JavaLanguagesEnglish, French, Spanish, German, Portuguese, Russian, ... alterations such as upgrades, modding with custom ROMs, rooting or flashing the Android device with other firmware will automatically void ...