Be it PoW or PoS, as for now, any project making people to think mining coins on phones is profitable is definitely fictitious, no coin existing for now that its mining on phone is profitable. Even the electroneum mentioned above is not profitable. You still have no choice than to use powerful miners. If you want to mine and want to profit, you still need to get ASICs for the best profit, especially if the coin you want to mine is not ASIC-resistant. Or at least, you can get yourself FGPA or GPU depending on the coin you want to mine. Monero is another good example of the coins you can mine on CPU, but phone CPU is too weak for mining any coin, even the Monero.
So far you refer to PoW, phone CPU is too weak to mine any coin. Better forget about it and get yourself strong miners like ASICs and graphic cards.
I've figured that there's not a single coin which you can mine on a smartphone for profit. Maybe PoS coins with "cold staking" features are worth it? Given that a phone's CPU is still not as powerful as the one used in computers, it'll take double the effort to make some profit "on the go". Even "Cuckoo Cycle" coins like aeternity are not as easy to mine on a smartphone as I've thought they would be. I hope that as mobile hardware improves over time, it'll be easier for people to mine cryptocurrencies for profit. It's much more convenient to do so on a smartphone than a computer due to its extreme portability. The only thing that's close to this is a SBC like the Raspberry Pi. But even this is not enough to stay ahead in the mining competition.
All in all, I appreciate your recommendations. I've been mining Monero and Ethereum with my PC's graphic cards, and the results have been great so far. I wanted something more mobile where I could mine wherever I go, instead of having a bulky mining rig that's stationary. Guess I have to wait until smartphones become comparable to everyday computers in terms of processing power. If that day comes, expect crypto to become much more decentralized than what it is right now.