The available functionalities can vary per device depending on the device manufacturer (OEM). Generally speaking, KaiOS supports all standard features like voice calls, text messages, contacts, camera, calendar, music, clock, and email.
You can find a list of our OEM partners in this article.
Feel free to follow our Twitter account (@KaiOStech) to stay up to date and get the latest news. Additionally, you can find information about our latest announcements on our blog.