Why we have to use "your" Windows Phone Project files it seems not reliable. Your plugin not working alone. As far as I understand it we have to make some changes on my Windows Phone Project folder. What are theses necessary changes. I read this tutorial but I'dont understand what should I do ? I need really help I stucked on certification in Windows Phone store because "On back button" event not working can you explain me what should be my next steps ? I'm only add the plugin as a object and add the back button event so what is next ?