Under Settings > Profile, you'll be able to change your avatar image, your display name, enter a phone number (optional) and enable Simultaneous Ring (requires a phone number).
If you have added a phone number you can enable Simultaneous Ring. When Simultaneous Ring is enabled, incoming phone conversations will be offered both in the browser and on your mobile phone. This makes it possible for you to answer calls without being near a computer.
If for any reason you need to change your email address, please email firstname.lastname@example.org with the existing user and the new information.