WhatsApp Adds Voice Messaging
WhatsApp today indicated that a new feature is headed to its Android, BlackBerry, iOS, and Windows Phone applications: voice messages. The updated WhatsApp application will allow smartphone owners to record and send voice messages to other WhatsApp users with a single tap. The app is smart enough to switch input from the regular microphone to the speakerphone, depending on how the person is holding the phone, and automatically sends voice messages as soon as they are finished recording. There is no limit to how long the messages can be. WhatsApp said the feature should be available to all 300 million of its users within 24 hours. Other over-the-top messaging apps, such as Skype, have added similar functionality in recent months.
I think that this function was just updated to be smarter now.