The only mobile device I had a couple years ago was a 1st gen kindle fire, and this time was also when I was very active on the forums and with CQ in general, so I attempted this exact thing a couple times and could never get it to work, because I don't think there are any good working doom sourceports for the kindle fire (especially not on the built-in OS's app store.) Either way, you could probably just get a cheap android tablet that can run one of the many modern doom sourceports for android and use that instead.