It's a holiday in The Netherlands today, so I'm a bit late with this, but Jolla has released another Sailfish update today, and it's a big one. The headline feature of the new update is that it enables the phone's 4G support for all countries. So, if you have 4G, your Jolla phone will now use it. The hardware was obviously available from the beginning, but it was never enabled until now.
Aside from 4G, this update packs a whole lot more - most importantly, it fixes a major annoyance with the Sailfish browser. The browser did not keep its tab contents in memory, so each time you switched to a tab, the page had to be reloaded. This has now been addressed, and tabs stay in memory properly.
These are just two of the many, many improvements, new features, and bug fixes in this update. Us Sailfish users know where to get it.