Ubuntu Touch is no longer maintained as a core product by Canonical. However, the Ubports community are continuing development.
Ubuntu Touch OTA-9 Update
As each channel and device has separate versioning, the following list shows the respective image numbers corresponding to the released update:
BQ Aquaris E4.5 : ubuntu-touch/stable/bq-aquaris.en - krillin: not yet released
BQ Aquaris E5 : ubuntu-touch/stable/bq-aquaris.en - vegetahd: not yet released
Emulator : ubuntu-touch/stable/bq-aquaris.en - generic: not yet released
Nexus 4 : ubuntu-touch/stable/bq-aquaris.en - mako: not yet released
Meizu MX4 : ubuntu-touch/stable/meizu.en - arale: not yet released
Emulator : ubuntu-touch/stable/meizu.en - generic: not yet released
Meizu MX4 : ubuntu-touch/stable/meizu.zh - arale: not yet released
Emulator : ubuntu-touch/stable/meizu.zh - generic: not yet released
Nexus 4 : ubuntu-touch/stable/ubuntu - mako: not yet released
Nexus 7 : ubuntu-touch/stable/ubuntu - flo: not yet released
Emulator : ubuntu-touch/stable/ubuntu - generic: not yet released
On a device, this "image number" is shown as the "OS build number" in System Settings > About this phone > OS.
Overview of changes
This list is only a highlight of the few changes available in this update. Please check the detailed changes for all the changes included in this OTA.
Milestone bug list: https://launchpad.net/canonical-devices-system-image/+milestone/ww50-2015
The following is a list of issues that notable enough for explicit mention in the release notes.