If the system package installation fails, it is recommended to upgrade the firmware before updating the mobile phone system. First, go to the homepage of vivo official website-Services-Search for the corresponding model, and click on the resource download to download the firmware package. Then enter the official website Home Community-Plate -V Powder Playing Machine-Playing Machine Skills-Search for the post "official website Firmware Upgrade Operation Tutorial", which has detailed steps and step-by-step operation.