It's not even just the middle-income countries—I have an iPhone 13, so only three years old, on a US wifi connection with high speed broadband, and it can't handle the glitzy bloat of the prospectus for one of my ETFs. I don't understand why a prospectus shouldn't just be a PDF anyway, but it baffles me that someone would put so much bloated design into a prospectus that a recent phone can't handle it.