Step1: Put the upgrade file into the root directory of U disk and insert it into the host USB interface

Step2: Click “FileManager”

Step3: Run all apk files,One by one installation can be completed

Step4: Click “INSTALL”

Step5: When “App installed”, Click “DONE”,The rest of the APKs are installed the same way

YouTube Video link：https://youtu.be/E4l48w45OFc