[horsawlarway]

Only if you're a sucker and pay big bucks to a shitty US carrier.

EU got rid of roaming.

There are carriers in the US that offer flat rates in all supported countries (like Google Fi: 135+ countries at time of writing).

I'm based in the US, I lived in Brazil for several months last year. I stayed with Fi, still paid 10$/gb and 20$/month for unlimited voice/text, kept my number, and immediately had data access.

As a side note, Uber was there, and we used it frequently.