If you haven't already, please install the "M&D Connect" app on your mobile device
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Once installed, pair your MW08 earphones to your phone and then open the “M&D Connect” app. The MW08’s must be connected in the Bluetooth settings menu in order for the app to connect to the MW08.
The app will inform you if an update is available. Firmware updates require earphones to be charged to 60% or higher.