New information about the future Ubuntu Touch OTA updates have been revealed by Canonical’s Łukasz Zemczak.

Among others, the Unity 8 UI has received visual improvements, new language layouts for the ubuntu-keyboard have been added, the Calendar app has been re-included in the OS, the Telephony stack has been updated as well,
All this changes will be included in the Ubuntu Touch OTA-5 Update, which should be released in mid-July, if everything goes as Canonical hopes. Also, the OTA-5 will contain fixes for OTA-4 regressions, will bring new icons for the Ubuntu Touch Core Apps and will add full screen rotation, among other interesting changes.
As a reminder, Ubuntu Touch is used by default on Bq Aquaris E4.5 Ubuntu Edition, Bq Aquaris E5 HD Ubuntu Edition and Meizu MX4 Ubuntu, a phone that is available only in China, for now. Also, Canonical provides official support for the Nexus 4 smartphone, developed by Google and LG.