this is more of advertisement than a real efficient way of mining any kind of cryptocurrency. and it is not even wise to do such things with your smart phone!
mining is about efficiently finding a block, or to do the calculations efficiently. if we ignore that, you can say it is possible to mine cryptocurrencies with your old PC from 15 years ago but you will never find a block or have enough hashrate to get anything.
with S9 you may get a half decent hashrate but you will also eat through your battery and shorten the lifespan of your device. and that is not even considering the heat!