Ruan Zhong Zhi Asus Zenfone 3 Max Zc520tl -

The ASUS ZenFone 3 Max ZC520TL (codenamed Asus_X008 ) was launched in 2016 as a budget-friendly battery champion. While its hardware (4100mAh battery, 5.2-inch HD display) was solid, the ruan zhong zhi (software/firmware) is what defines the user experience today. Official Firmware (Stock ROM) The device shipped with Android 6.0 Marshmallow under ASUS’s custom ZenUI 3.0 . Later, an official update to Android 7.1.1 Nougat was released.