The common phone is a sub-$100 Nokia or nothing at all? Even in the US there's something like 10% of people with no cell phone at all, and 50% with "smartphone

The common phone is a sub-$100 Nokia or nothing at all? Even in the US there's something like 10% of people with no cell phone at all, and 50% with "smartphones" which is a very broad spectrum ranging from crap to significant household purchases before considering "data plans" are optional and also range from crap to good. Even non-phone connection quality can be terrible - I rarely find myself on public or hotel wifi with actually good connections. The difference between 200kb of JavaScript and 10kb can often be measured in seconds.