Chat may be activated on mobile apps. Tap the symbol that looks like three lines in the upper-left corner of the screen. Scroll to the bottom and click on "Settings." Choose the account that you want. To find "General," scroll below. Make sure that the box labelled "Show the chat and spaces tabs" is checked if you are using an Android phone. Toggle the option to "Show the chat and spaces tab" on if you are working with an iPhone or iPad.