I would go to electroneum if you talk about mining in mobile. Mobile phone mining has been invented by electroneum developer in 2016. I dont think it will going very well with other project.
I still think it's a waste of time doing anything mobile mining, why not stake and get some dividend if OP is looking for a passive income.
It's unrealistic to make profits in mobile mining in at this level considering the power, energy consumption and other factors like phone capacity.