Nokia 3310 4G

Nokia 3310 4G, is an entry-level YunOS device released in January 2018. It's China Mobile LTE (TD-LTE) exclusive device.

The YunOS itself is heavily modified, and it cannot accept any kind of APKs.

About Nokia 235
Nokia 235 TA-1177 is a cancelled YunOS based device with similar specs to Nokia 3310 4G. Unlike Nokia 3310 4G, it can accept APK installation.

[https://www.youtube.com/watch?v=MCSKcyiZxWU Hikari Calyx Tech provided a video of the Nokia 235 prototype unit. ]