How do i know which firmware 4.4 needs to be installed so to support VoLTE? galaxy note 4 n910g

[AC Question]

Hi!,

I have a problem, have the Note 4 n910g this came with android lollipop; in my work we need android KitKat so we downloaded this.
My problem is that the phone is not supporting VoLTE and we don’t know which firmware have to install to support this technology.

 

[Rukbat]

Are you sure that KitKat for the G supports VoLTE? If it does, your carrier's version of the ROM should work.