Step1: Copy the upgradefile with a U disk, and add “canupdate” in front of it. 

Step2: Click Filemanger-USB drive, long press to select the iap upgrade file and click the Copy icon in the upper right corner

Step3: Click Back to go to the internal shared storage space, click the upper right corner to paste the icon, and then make sure that the iap file you want to upgrade is in the root directory of the internal shared storage space

Step4: Click setting icon

Step5: Select the model as No protocol before upgrading，and the host Reboot

Step6: Click "CANbus information” or “Protocol debugging”

Step7: Click "Box upgrade"

Step8: Choose “Hiworld” and click “Upgrade”

Step9: Click “sure”

Step10: Upgrade success

YouTube Video link：https://youtu.be/CIr3eg2Ripk