Presumably people are buying the best phone for their budget and needs. Per OP, "They don't own a PC, this is the only way to safely conduct e-commerce." How many people with an iPhone do you want to bet have a PC, versus how many people with a "junky low-end android"? I'll bet you vastly more iPhone owners have another computer.
"DMV" implies the US, although I can see where that might not be clear to a reader from another country.
Like it or not, HN is an English-language forum, run by a company based out of SF, and a lot of commentators presume that context. I try not to, just as I strive to use clear English for the benefit of ESL speakers. But it is the default.
iPhone alone is ~50% of US market share: https://www.statista.com/topics/2711/us-smartphone-market/
Android splits the rest.