Feature phones running on KaiOS, powered by 256MB RAM or 512MB RAM will be compatible to run WhatsApp on them. WhatsApp will come pre-installed on future Kai OS devices and will be available to download on Kai Store (pre-installed on these devices). Jio Phone and Jio Phone 2 got the support to run WhatsApp last year, and this has now extended to other Kai OS devices, including a number of Nokia feature phones. This is also the OS that is running on the JioPhone. WhatsApp recently announced that it'll now run on devices running on Kai OS. WhatsApp was incompatible with these devices, until today. Also, people who work at construction sites or places where physical labour is involved, don't want to use a delicate phone that would get damaged in those conditions.

Some people, especially senior citizens, like using the classic feature phones that have basic functionality along with strong build quality and a battery life that lasts for days. Sadly, not everyone can either afford or understand the complexities that are involved in using phones with these operating systems. However, WhatsApp was only available on devices running on Android and iOS.

This messenger has almost killed conventional text messages, and on some levels voice calling too, with internet-based voice and video calling feature. Today, in India, WhatsApp has to be one of the most popular ways of communicating on a smartphone.

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