What aspect of this are you curious about?
If you are looking for how to get the phones to mine there are a few good ones. I am of course going to shameless plug my own:
https://play.google.com/store/apps/details?id=com.nanobytes.pickaxe
If you are wondering how profitable it would be, you might get $1.50 - $2 per week per device
> Snapdragon 400/410 CPU
Perfect! That is a 64 bit processor https://www.qualcomm.com/products/snapdragon/processors/410
Here is a link to the app on the play store, and if worse comes to worse you can just install the APK manually
https://play.google.com/store/apps/details?id=com.termux&hl=en
Edit: Termux seems to only work on 5+ ... Hmmm. How familiar are you with ADB?
I bought mine off of eBay 2hours after the announcement to go back to asics. Paid 1099 for a brand new one and 120 for a new apw3++ psu from Amazon. While waiting for delivery, I ran an Ethernet Cable to a closet in my game room where my circuit breaker panel is located, then added a 220vac outlet (running 246vac). I also bought a 220vac high/low voltage protectorAC 220v Surge Brownout Voltage Protector 3600 Watts Air Conditioner Freezer https://www.amazon.com/dp/B00LCFH3H0/ref=cm_sw_r_cp_apa_JVvrBbF1KG56C Got it Sunday afternoon, pointed it at etn.superpools and so far I earned 2638etn in a couple of days. I see my hash rates all over the place, saw 370kh/s and got excited, then saw 150kh/s and thought well we shall see over time.
etn.superpools had a easy set-up guide
URL: stratum+tcp://etn.superpools.online:9999 Worker: WALLET_ADDRESS+PAYMENT_ID.6000001
The number after wallet address represents difficulty, payment id is for exchange
This has been a fun learning hobby, hopefully we will earn some money along the way.
Good luck with your adventures 👍
If you were actually interested in using your phone to mine "for real" there are better apps to do it.
I know how much of a shill this is, but checkout this app:
https://play.google.com/store/apps/details?id=com.nanobytes.pickaxe
I imagine your hashrate will quadruple
I am the developer of this first one, so I recognize that I am a little biased
https://play.google.com/store/apps/details?id=com.nanobytes.pickaxe
But you can also check out AA Miner. Though, AA Miner is basically cancer, it does work; but your hashrate will be slower than on my app or the official one