If your phone isn't iOS, then you can install XBMC on your chromecast without having to root it. Check this link out to see how you can do so
Hope this helps!
Hi everyone. I'm new here and I am a software engineer from India. I noticed that many of you are having trouble installing XBMC on chromecast. XBMC is now called Kodi. So there is a way to do it. If you follow the steps clearly, it is very straightforward. And this method works only on Android...