for iOS device: Tap on the “gear” icon on the top right corner →Tap on “About” →  App version. Tap on the “pencil” icon on the top left corner →Tap on the Candle Light → On the “Device Settings” page  see Firmware Version.    for Android device: Tap on  the “gear” icon in the top right corner →Tap on “About” → App version. Long press the Candle Light → Tap on Settings→ On the “Device Setting”page see Firmware Version.  

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