https://qz.com/1288920/reliance-jio-has-become-the-world-leader-in-feature-phones-in-just-10-months/

A quarter of all mobile handsets sold in the world are feature phones, with no touch-screen displays or advanced computing capability. In developing regions such as Africa and India, these affordable phones often control up to 60% of the market.

Now, an Indian company has emerged as the leader in this category.