We know that the Flyme 5.6 is the latest version of Flyme OS released by Meizu based on Android 6.0 Marshmallow. Moving on to the future development, currently the testing for Flyme 188.8.131.52 underway and if you wanna give a try of the Flyme 184.108.40.206 then we have test firmware available officially available from the Meizu Forum site.
The Flyme 220.127.116.11 includes few minor improvements from official and stable Flyme 5.6 release. This however happens to be a test firmware rollout, so for those who wanna have a stable performance on your device, then please skip this one, until any new firmware update rollout begins for your device.
We are thinking what will be the Meizu FlymeOS version for the upcoming Android 7.0 N release. Will it be Flyme 6.0? Fingers-crossed.
Source: Meizu Forums