UBUNTU FOR DEVICES
SEEMS IT'S GETTING CLOSER, AND NOW THERE IS A COMMERCIAL PHONE AVAILABLE WITH IT PRE-INSTALLED
#Ubuntu #UbuntuForDevices #UbuntuTouch #UbuntuAndroid #DualBoot
Even if you don't want to pay for a new phone in order to try Ubuntu on it, there are other ways to give it a try.
It's now possible to have Ubuntu alongside Android and give it a try from time to time.
Ubuntu can also be indepandantly installed, instead of Android, but it's a little risky.
You may want to take a close look at https://developer.ubuntu.com/en/start/ubuntu-for-devices/installing-ubuntu-for-devices/ for the standalone installation and at http://lifehacker.com/how-to-dual-boot-ubuntu-on-your-android-device-1577325241 for dual booting.
Haven't rooted my phone yet, so, it will take some time until I try it myself.