If the firmware upgrade of the Xiaomi Robot Vacuum fails, please try the following methods:
1. Please check if the robot vacuum is at the base station and if the battery level is above 30%. You can place the device on the base station and charge it before upgrading.
2. Check if the home network is working properly and ensure the upgrade is performed in an environment with a good network. You can also try using different mobile hotspots to upgrade.
If none of the above works, please provide feedback to us in the Xiaomi Home App.