What factors can lead to an update failure?

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1. The battery level of the aircraft or remote controller is below 20%.
2. The aircraft or remote controller is powered off during an update. If this happens, restart the aircraft and remote controller, and try again.
3. The network is disconnected during a firmware download.
4. Your smartphone interface is switched to other apps during a firmware download.
^{The aircraft will restart multiple times during an update and automatically power off after completing the update.}

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Sources

This answer was generated from information sourced from the following pages:

• heliguy™ Blog - www.heliguy.com/blogs/posts/
• Drone Tutorials - www.heliguy.com/pages/help/