Mining on mobile phone ? why not in 2018 . I got 3-4 old phones what are in the box without any uses for while , so i can start mining with then. IF you can charge them at work, an at work charge Power Bank why not free energy.
Well... I just wonder... may be it's not the most original idea, but... I've a solar charger for my mobile... if I let the mobile in charge with solar energy, then mining would be profitable, even for small sums.... mmm. Why not, waiting for the details :-)