"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.
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.