At the end of December 2019, a common method for unlocking the bootloader on all Meizu smartphones equipped with Qualcomm Snapdragon was published. This activates the development of custom ROMs.
The Chinese developer XiNGRZ has taken on this job. His plans are to develop custom roms for 12 models: Meizu 16T, Meizu 16s Pro, Meizu 16Xs, Meizu 16s, Meizu Note 9, Meizu Note 8, Meizu X8, Meizu 16 (16X), Meizu 16th Plus, Meizu 16th, Meizu 15 and Meizu M15 (15 Lite).
So far, experimental versions of MoKee ROM are available for download for Meizu 16T, Meizu 16s, Meizu 16s Pro and Meizu 16Xs, and are running on the Meizu Note 9. They are based on Android 10.
Meizu does not allow bootloaders to be unlocked. The published unlock method is unofficial and carries risks, so it is desirable to do it only by advanced users. This requires a Windows computer with adb (Android Debug Bridge) environment, Meizu smartphone with Snapdragon processor, root privileges and knowledge of Android OS.
The company was reportedly launching its own investigation into the matter. Because the bootloader is unlocked by modifying the FRP partition (Factory Reset Protection), this is interpreted as a vulnerability in the phone. So it is possible that the FRP method will become inapplicable in subsequent updates.