There is nothing real about mobile mining, it's no lie that the high end smartphones can't handle crypto mining till date, may be possible in future but not today, whatever mining interface you are seeing on an app it's not real mining, it's like using a cloud mining service like orbot or genesis mining services
I'm sorry but we have to deal with facts, and the fact is: it's possible to mine on smartphones nowadays
It's profitable or is it worth? Maybe not, but it's possible and real
Look:
https://www.youtube.com/watch?v=yhMdqHKYp5QThere's a way, not to simple, but not hard to a person who are used to mining with PCs rigs, to mine Veruscoin for example, on smartphones.
I already tested some "miners" and I remember Electroneum for example, it was only a simulation of mining, to distribute some coins and attracts people to the coin
But now it's real and you can really mining on smartphones
For today, like users already said, maybe worth something if you have some good hardware with cracked screen, or in a near future we can have even more powerful processors and gain some money with a samsung s21 or the next device...
It's in the beginning, could be something in future or not, but it's real and you can test by yourself
