Mining with a normal computer doesn't pay - you will pay probably more for electricity than what you get out of it.
Now mining with a mobile phone (destroying your battery in the process) is even much worse.
It pays off. I mine Monero with this comps CPU over night when i sleep. Dont say stupidity.
Mining on any phone is useless as no matter how much it advertises, it still doesn't have enough computing power.
Even an i7-6700 non-k processor is capable of mining around $17 in XMR per month after electrical costs at ten cents per kilowatt, and Ryzen CPUs will usually mine around the same amount of Crypto per month. Note these estimations come from Nicehash's calculator and withdrawal fees, etc are not included in these calculations.