Ubuntu touch had a dual boot installation option as given here https://wiki.ubuntu.com/Touch/DualBootInstallation#Installation
Shall we create a UBports dual boot option so that any android device can have a dual boot into UBports ubuntu phone, which will help more users to familiarize into ubuntu phone and also helps developers to use ubuntu from same android phone whichever they have.
The ubuntu installer apk is available here https://forum.xda-developers.com/attachment.php?attachmentid=2478802&d=1388212319
Dualboot would be sweet. There are some Android apps that i would like to use sometimes.
@alternator I tried multirom v33 via, xda,on my pro 5,it worked quite well,I did not try Ubuntu on it,but it is set up for it.