https://www.techradar.com/news/jollas-sailfish-os-3-will-offer-simple-smarts-for-cheaper-phones

Jolla may have failed to make an empire to rival Android with its Sailfish OS, but it’s changing direction with Sailfish 3 to focus on 4G feature phones. 

Four years ago we previewed the original Sailfish OS. It was pretty but has only been used in a handful of low-key devices since.