I know the US is skewed towards iOS, but Android is the #1 mobile OS, presumably due to cheap devices.
Is there a stat showing Samsung is largest manufacturer? I found this, but company market cap != number of devices obviously
https://finance.yahoo.com/news/16-biggest-smartphone-compani...
It looks like there are 20+ manufacturers in the Open Handset Alliance: https://en.wikipedia.org/wiki/Open_Handset_Alliance