Twitter on Wednesday started testing a new voice messaging feature for direct messages (DMs), and it's being rolled out in a phased manner to users in India, Brazil, and Japan. Voice DMs will let users send voice notes as DMs. Just like for voice tweets, each voice DM can be a maximum of 140 seconds long. The test feature is being made available for both Android and iOS user, but users can listen to the messages they receive even via a Web browser. (Video Credit: ANI)