Check out this KB article for more information on the workaround Mike suggested. We also have a Feature Request you can vote on for a fully developed HUD on the mobile app.
Jessica, I still not sure what you mean. All I need is a simple answer if Ringcentral mobile App has the same ability as desktop phone to show presence - if another agent on the call, for example. If you do have this feature - can you help me to set this up, if not - are you planning to implement it. That's it. Thanks