How to WOL from the internet?
Yup, http://www.howtogeek.com/192642/how-to-remotely-turn-on-your-pc-over-the-internet/ notes the other steps.
I have managed to setup my pc for wake on lan and when I am on my home network I can start and shutdown my pc using wake on lan android app from my galaxy s5 app.
My question is why can I not do this away from my network when I have mobile data only? Is there a way to set this up if so how? Would a wan router help?