Voice Messaging allows you to instantly communicate with a contact or group chat. It provides an enriching chat experience, and you can count on it to deliver important and time-sensitive messages. As such, all Voice Messages are downloaded automatically.
To use Voice Messaging, simply tap and hold on the Voice Message button.
If you want to cancel a Voice Message:
Click on the End Call button, or slide on the screen if you have a touch screen phone.
A really cool and innovative feature of Voice Messaging is that when your Voice Message has been played on the recipient's phone, the microphone icon will turn blue.
After you receive a Voice Message, tap/press the Play button to listen.
You will see an option on the screen to switch from Speaker to Earpiece.
The microphone next to the messages that you have not listened to will be green:
The microphone next to the messages that you have listened to will be blue:
WhatsApp Support Team