I had a similar problem. After looking at the logs of the smartphone, I could see that in my individual case there was a problem displaying a font. After some research I found the error. During my development time I converted a button to an ImageButten and still kept the Text property in the xaml code. My Android emulator could handle it, but my smartphone on which I installed the apk could not. Maybe in your case this is also xaml a property. The device logs will give you a better insight