I know +Martin Wimpress recently flashed a Flyme Pro 5 to Ubuntu. Good idea :)
How to flash Meizu Pro 5 to Ubuntu Touch

From the start the Meizu Pro 5 Ubuntu has become very popular. Unfortunately, the phone was sold out very quickly, therefore a lot of Ubuntu users couldn't order the new Meizu Pro 5 Ubuntu phone. For that reason Wouter Voeten and Maarten van Druten have made an extensive document how to flash a standard Meizu Pro 5 phone (with Flyme OS) to Ubuntu!

They would like to share this document with others, so more Ubuntu users can enjoy having Ubuntu on the Meizu Pro 5 phone. It gives any user a fully working Ubuntu phone, that accepts all official Ubuntu OTA updates.

This document is a manual for people who have advanced experience with flashing phones. The manual has been tested by several users and it works perfectly with the International and Chinese versions of the Meizu Pro 5. However, using this manual is at your own risk. We cannot guarantee your phone will be working. If you experience any difficulties, we or Ubuntu cannot be held responsible.

To learn more about flashing a Meizu Pro 5 phone to Ubuntu and to download the manual, click here!

https://www.smoose.nl/sites/default/files/bestanden/meizu_pro5_ubuntu.pdf
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