You can change your First name, Last name, or Mobile number in Ringba at any time. Just navigate to Settings > Profile, enter the information in the field, and click Update.
You can also change your Ringba password from this screen.
Note: You cannot change your email address in Ringba this way. If you need to change your email address, see How can I change my email address in Ringba? for step-by-step instructions.