When I am on my mobile phone trying to login into the native iOS app of Questmate on the login screen and I am not on WiFi and my mobile data (such as 4G) is turned off for this app, then the login via phone number or via email address looks like the app does nothing or is broken. A small notification to turn on data or give it WiFi would help me. As simple as "No internet connection!" would tell me that it is my fault and the app is not broken. It took me a while to remember to turn on mobile data for this app.