Feature phones -- made by companies such as Nokia, Micromax and Alcatel -- are used by millions of people in developing countries. Some estimates suggest more people in India use KaiOS than Apple's iOS, while TechCrunch reports that feature phone sales are currently growing faster than smartphone sales.

In a statement, KaiOS CEO Sebastien Codeville said that the funding will help the company "fast-track development and global deployment of KaiOS-enabled smart feature phones, allowing [it] to connect the vast population that still cannot access the internet, especially in emerging markets."

It makes sense, then, that Google would want in on this, and to have a presence on whatever tech is being used in this booming market, internet connectivity or otherwise. Plus, when feature phone users do eventually upgrade to smartphones, they'll be more likely to opt for Android if they've already been enjoying its related apps and functions. It's a significant investment for KaiOS, but $22 million is nonetheless small change for Google, and their future returns could be huge.