I pay about $10 American or equivalent for a plan that includes 6100 minutes, 6100 texts and about 15 gigabytes of mobile data. $3 American for every 3 gigabytes of extra data I want to use that month.
As the other poster said, food and services are dirt cheap here but good luck getting anything else, if you're a normal worker you won't own your own house even by saving 40 years, cars and plenty other goods are taxed so heavily you're paying far more than you'd pay in America* and you have to deal with economic uncertainty and instability that would make you think the 1929 stock market crash wasn't that big of a deal.
The flipside is that, obviously, should you have a high paying job where you can work regardless of location you get to live and save like a king; and that at higher economic levels (talking low 7 figures income yearly at the min) the prices of property go from completely out of reach to relatively cheap. That and unlike Hindoostan there are relatively decent places to live in LatAm as an expat, just mind your surroundings for the less... educated locals.
In conclusion while it is true that $50k yearly in America does not go as far as third world shitskins believe it does, it does grant you a standard of living that you would need to be upper-middle class to even achieve over in the less developed nations.
*: a recent example, I bought some shitty Nike running shoes recently, I paid the equivalent of $220 American (with a 25% off sale at that) while the same model on the American Nike store was priced at $115.