In the Ubuntu Touch installation page, there is this command that will wipe out the phone data and install Ubuntu Touch, but has 4 different options, what's the difference between each of them?
To install the Ubuntu Touch Developer Preview on your device, you will need to execute the command below. Please note, this will wipe the contents of the device so ensure you have made a back-up. To install and get updates, run the following command:
phablet-flash (cdimage-touch|cdimage-legacy|ubuntu-system|community) -b