Impossible to update one's phone number or email within the app (or to even see these details). And it needs to call directly through the app, particularly when I'm in a building and on WiFi only. Also, when the doctor dropped the call, I tried calling back, but it kept saying "application issue" when I called the number back, with no method of messaging the doctor in-app. Please make the user experience more friendly in these regards & I'll consider upgrading my rating from less than abysmal.