Mobile DevOps receipt with VSTS, Xamarin Cloud and Hockey apps

We've learned a lot through doing DevOps: Every commit is automatically integrated, tested, and deployed to a staging environment. And then it only takes one push of a button and the release goes live... Unfortunately, it's not so simple when we speak about the mobile applications: How we can test our Application (we need a test farm of mobile devices? Or we can use the cloud for this reason?), How we can deliver our alpha, betta releases for out test users? About these themes I will speak during my session and I will show all configurations in VSTS, Xamarin Cloud and Hockey Apps.