(They charge cellphones with small solar panels and/or petrol generators for the community)
That's interesting--are you saying there are places in the community where people can go to charge their phones with solar or gas-powered generators or that individuals own and use them? Either way, it sounds like the places you're talking about don't have the most reliable power grid, if there's a grid at all.
We should also find ways for people with those phones to execute tasks that will enable 1st world countries to pay those people with "cheap" micro payments. (Lightning Network) ...example : translation services / typing / spell checking / sorting of data etc...etc.
You described the people you want to help as basically subsistence farmers, living off the land. If that's true, I doubt they'd be able to do any of those tasks if they haven't had much of an education. That said, I don't have a clue about what level of education they have; I'm just making an assumption. I also seriously doubt anyone in a first world country is going to provide steady, reliable work like translation or spell-checking to strangers in a third world country. That's just reality--especially since there are tools for both of those things readily available on the internet.
And if those farmers in Africa receive a micropayment of bitcoin, is there a good way for them to convert it to their local currency or to spend it? Most exchanges that deal in fiat have minimum transaction amounts, which might be prohibitive in a scenario like you've proposed.
By the way, don't most people use smartphones nowadays, as opposed to the old-school flip phones? I've read about MPesa in the context of the gambling problem among youth in Kenya, and from what I gather they're using their phones to place bets. You can't do that easily with anything other than a smartphone.
You know.... a lot of these people has gone through a lot of hardship in their lives.. and they do not have all these petty issues that some people in 1st countries have. If you are lucky enough to have power in your building, then you must provide a service to the community around you. (obviously at a fee)
They share transport to the nearest town to buy food and to charge their phones, if the Spaza shop (Tuck shop) offers that service and to buy airtime. Some even provide a charging station or kiosk to charge your phone, but it is very expensive ...compared to 1st world countries.
The culture is a lot different to what some people are used to... so sharing your bed or car or household appliances... are not strange to them. (They also have something called "Black tax".... where the one with the job... will support any family member or members as a kind of payback for what was given to them) ....very interesting concept.
In any way.... they make a plan, no matter what their situation is... borrow...beg or steal... they get it done.
Oh, to answer your last question.... yes a lot of 1st world countries are dumping very good phones in 3rd world countries... so the phone quality are getting better and better over time.