The UBPorts project has released Ubuntu Touch OTA-4, based on Ubuntu 16.04. The project considers this release to be "the 'official' starting point of the UBports project."
Details and upgrade steps at https://ubports.com/blog/ubports-blog-1/post/ubuntu-touch-ota-4-release-166
Happy upgrading!
Details and upgrade steps at https://ubports.com/blog/ubports-blog-1/post/ubuntu-touch-ota-4-release-166
Happy upgrading!