Magene C406 Firmware Update [extra Quality]

Observed failure modes (from user community reports and testing):

Have you experienced a unique bug during your update? Drop the version number and error code in the comments below. magene c406 firmware update

: Unlike Garmin or Wahoo, the C406 does not support USB mass storage mode for manual firmware loading. Bluetooth OTA is the only public method. Observed failure modes (from user community reports and