How do I upgrade the operating system on the FC2 Controller?
Go to [Settings], find [System], and tap [About phone] to check the current core version. Then tap [Wireless upgrade] and click [Check for updates] to start the upgrade. The controller will restart automatically after upgrading, and you can return to the status interface to verify the new core version. (Page 18)
From the official Efix Fc2 Handheld Controller manual, page 18
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