Well a "smart phone" that has an applicable plan does not come at a cost of less that 100$ and then applying that to the currency exchange compared to the income of the country this was likely produced in is likely a greater portion of the income that they earn compared to yours, secondly, they would have to pay a recurring monthly payment to maintain service.
Sure you can buy an ox for cheap, and only feed it grass, but again with the effects of economy, this is a large portion of the income, and only for a few years due to age and possible injury to the animal.
The funny thing is, when I overcome my difficulties, I do with my own sweat and blood.
Dont be stupid, stupid.