If you are having any issues with communicating in-game using the Razer Nari Ultimate for Xbox One | RZ04-02910, do the following workarounds.
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Make sure the mic diaphragm is in front and the air vent is facing away from your mouth.

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Make sure that you are not muted.
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Press the game/chat balance control.
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Ensure that the LED indicator on the mic is off.
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Check additional troubleshooting on the Xbox One help site.