Only analog out coming from the X is the 3.5, you would have sound - no video though, unless a dev comes up with a way to route the signal which I would think would be very difficult/impossible through the audio jack, there is enough rings. Now yes a converter would work, so would anything that has a HDMI IN/ANALOG OUT - your phones more up to date with your existing hardware I'm afraid. I have seen things on the net where people have ran the signal through the USB but nothing ever came of it, and it was dismissed as BS.
Good luck!