The justification for this is to make certain that all users under the age of 18 on Roblox are protected from harm and remain secure. Only players that have voice chat turned on will be able to communicate with one another when they are actually playing the game. To do this, go as follows: Sign into your Roblox account. Go to the Settings menu (the Cog Wheel in top-right corner) Click on the tab labelled Privacy. Make the voice chat available.