The smartphones are big part of our everyday's life. I use mine to earn some cryptocurrencies each day when I have a free minute or just in the background while I'm working at the office.
Here are 10 ways that you can make some change by using your Android smartphones.
1) Electroneum - I'm pretty sure you guys have heard about ETN by now. The phone app (Android and iOS) offers cloud mining, that is inconsistent of how much you make per day. And as far as I am aware you can mine it using an Asic.
https://play.google.com/store/apps/details?id=com.electroneum.mobile&hl=en
If by any chance any of you haven't joined already and wants to, feel free to use my referal code: 48F497
Keep in mind you cannot use multiple devices with different accounts because they have KYC authentication.
2) Phoneum - free cloud mining and a game. More info here: https://www.publish0x.com/welcome-to-my-life/free-cloud-mining-phoneum-token-mobile-xwwlew
3) Microwork - earn ETH by taking pictures with your smartphone. More info here: https://www.publish0x.com/welcome-to-my-life/earn-eth-pictures-you-take-your-smartphone-xqmrje
4) Pi - cloud mining app: https://play.google.com/store/apps/details?id=com.blockchainvault&hl=
It is an interesting app that works in the backgroud. There is serious team behind it and the whitepaper that you can check and learn more about Pi.
My referal link is(in case anyone wants to join my team): https://minepi.com/dmad2010
5) Bitcoin Blast - play a game and get paid in bitcoin. More info here: https://www.publish0x.com/welcome-to-my-life/bitcoin-blast-cool-little-game-pays-100-satoshi-day-xznozr
6) BuzzBreak is a news app that shows you buzz breaking news from the internet! You can also earn Points redeem them for cash! Here's the link:
https://play.google.com/store/apps/details?id=news.buzzbreak.android&hl=en
7) CryptoPop - Small game that pays in ETH. It's a fun one and I really like it. https://play.google.com/store/apps/details?id=com.mansoon.cryptopop&hl=en
8) Storm Play is an app where you are rewarded points for completing tasks - playing games, answering questions, leaving movie review, etc. You can withdraw in BTC and ETH. https://play.google.com/store/apps/details?id=com.cakecodes.bitmaker&hl=en
9)Quarry - awesome app that lets you track any airdrops, complete tasks, publish articles, get rewarded, improve your airdrop rewards drastically. https://play.google.com/store/apps/details?id=com.airdrop.blockchain.wallet.dappstore.token.quarry&hl=en
10) Bitradio - listen Radio and get paid in BRO token. Awesome app, you can leave it on even without listening and you will still be getting paid. You will also need wallet for it. More info on bitrad.io. Link to Play store: https://play.google.com/store/apps/details?id=io.bitrad.bitradio&hl=en

Those are 10 ways I know. Please share if you know anymore methods that you know that actually pay.

Thanks and good luck to everyone.

PS - 1 Bonus way: CryptoTab browser that you can use on your PC now can be downloaded on android and can use your CPU's power to earn some bitcoin: https://play.google.com/store/apps/details?id=com.cryptotab.android&hl=en