Install Flyme OS 6 on Meizu M2 (mini)
The Flyme OS 6 is officially in a beta stage and only invited peoples can use it, there is a lot of website where You can download it (6.6.12.30), but for the M2, only the QY version is available.
The problem with QY version is You probably can't install it, because it says "Firmware corrupted".
Happily I found a proper Y version which installs successfully.
Download link for 6.6.12.30Y Beta.
Also look Here about Rooting it!