It works! I recently came across this article on mining Electroneum tokens (ETN) using a mobile app for the iPhone:
https://9to5mac.com/2017/12/21/hands-on-mobileminer-how-to-mine-cryptocurrency-on-an-iphone-video/
I followed the instructions and am now I'm able to mine coins with my phone. Obviously, its not very profitable as I'm only mining around 2 coins per day. And it drains your phone's battery, but its a neat concept and fun to try.
