Some Razer Phone 2 users sometimes experience the following issues:
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The first few seconds of the audio file are extremely quiet, almost inaudible, when you put the phone to your ear.
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The first few seconds of the audio file are covered by a loud static noise when you put the phone to your ear.
These are known issues for the Android Platform and not the Razer Phone. Google has acknowledged this issue and is hoping to have it fixed in future Android OS updates.
Note: Any messaging apps with voice message feature could be affected including WhatsApp, Line, Facebook Messenger, Telegram, and so on.