Ok, the topic is a bit of an exaggeration but it’s close - you just need more of them. According to an article (at IEEE’s magazine no less), hacked phones with open software OS’s can be used to create inexpensive smartphone datacenters from decade old phones.
In this example, they used PostmarketOS and four 10-year-old Nexus phones to create a miniature AI fish identifier that they could lower to the ocean to collect marine life data. The article is quite extensive in painting a picture of how old phones, practically e-waste, can be made into something powerful and useful with almost no cost with linux.
Maybe there should be projects and available combo’s to buy for those that want to use these devices as clusters. It would be an interesting future where you’d add your previous phone to every few years to the cluster “heap” that would assimilate all its processing power and distinctive data as part of the hive mind 
… that user uses from their new(er) linux phone / tricorder. How many L5’s does it need to screw in a light bulb or identify what that is from a picture? See: