I advice NOT to mine with a smartphone. My friend was doing some experiments coding a version of cgminer for his s4 and guess what, he fried the CPU. PoW is just not for smartphones, it's pointless.
It is pointless to experiment on a CPU which is designed to be operated at low power and low efficiency with no cooling. Even PoS is pointless since you can't run it unless you have lots of ram and space for blockchain.