As you may know, the Meizu MX4 Ubuntu Edition has become available in Europe a few days ago, Meizu dropping the invite-only system.
Canonical is constantly updating their Ubuntu Touch operating system, now used on two Bq phones and a Meizu one, because the system is still young and not ready for massive usage.
Based on the feedback they receive from the users, the Ubuntu developers push as many improvements and bug-fixes as they can.
The Ubuntu Touch OTA-5 Update has been released one week ago and among the most important Meizu-specific enhancements is the battery life, which has been doubled.