JavaScript and “grandma-phone”, or The biggest platform you have never heard of

Have you ever bought a phone for your grandma or grandpa? How did they look like? Were they key-based phones with big keys?

What if we tell you that the "similar" phones without touch screens can run WhatsApp, YouTube, Facebook?

During the talk, we look at one of these phones, check the software and hardware limitations and the system architecture. We will also dive into the system app and try to write the app from scratch.