> There are places where a device running Android 4.2 are the best one on the market.
Where? With the possible exception of China [1], after the Moto G and Android One, I'd expect that you could get a KitKat (or better) entry-level device pretty much anywhere.
[1] where there are entry-level KitKat devices, I'm just not sure of their quality since some major entry-level manufactureres (e.g. Xiaomi) are still on 4.2, not to mention that I wouldn't expect Google to go out of their way to support Chinese devices since they don't come with and generally can't use most Google services.
Almost all Xiaomi, OnePlus, Gionee, Oppo phones are running KitKat.
Xiaomi is running 4.3 on their cheapest device which would be the last device to get KitKat this month. Almost all their devices are running KitKat for a long time and they had released an unofficial testing ROM for 5.0 a week after the code was pushed. Xiaomi phones do come with Google services. Their flagship devices are expected a 5.0 early 2015. I would say they move faster than most brands.
I went from iPhone to their $100 model and find almost nothing that I could do before that I now cannot. Even in terms of performance and polish. Actually I can do slightly more thanks to Android Wear, but Xiaomi has less to do with that.
Where people don't have the opportunity to look up online to see what are their options are, but good students come out of those situations nonetheless.
Most them are on 3G network and reception of a wifi network is an accident.
That being said, its extremely frustrating to see this happening.