As per Detailed understanding from various thread from this forum I found that flyme dev team facing issues in providing VoLTE feature in G firmware they actually rolled back the feature in 5.1.3.4G because of various issues in the firmware 5.1.3.2G


And they were enabled in the Chinese Firmware we all can request Chinese Firmware dev team to provide Chinese firmware i.e A version for Meizu M3Note L91 series same as M91.


if you are interested this please make a share and administrators and moderators please make a discussion on this with whom it's necessary.....




Thanks,
Noble