Ask HN: Are there any programmable 'feature' phones?

The big attraction for me with smartphones was the ability to write my own programs on them. While this is still true (less true for iOS, but that's my opinion) there are issues with smartphones that I don't want to deal with (privacy, software bloat etc.). Admittedly, the term 'feature phone' is a little vague but I'm referring to a device with minimal internet and multimedia capabilities but not to the to the extent of smartphones - a poor man's smartphone, if you will.

Is there a programmable feature phone which has smartphone level programmability (hopefully more) and an open OS to hack on?