You can update your mobile number and email address within the app. Tap the hamburger menu in the top left corner of the app and tap Account from the menu. Tap into the Mobile or Email field, type your changes, and tap Next. This will take you to a verification screen. You should receive a verification code either through phone or email – whichever you just updated. Enter the code in the verification screen to save your changes.
If you’re having any issues with the app, please contact Support.