hello this post is just to share the information. Some of our L91 user may asked to Meizu's service center through whatsapp or messagener "hello sir is L91 support Volte" obviously the outcome is either "our dev is working on it" and "sorry L91 isn't have the hardware feature" the fact is both model do support volte . L model removed the volte option and ims from build.prop and the codec thats switch NB And WB. as you see in pic NB is normal mode and WB is the codec for HD voice this proves flyme team isn't deleting VoLTE option for L91 model they just progressing. To my friends who saying it is supported in A then why not in G the answer is......even A having some problems in HD voice like u have to go through the process again if the phone gets restart even in latest version of A version  so wait for the update and enjoy the current settings of flyme.....if you think my information is wrong or there should be some pharse that should  edit Cmnt below but cmt in English..