convert LTE to volte

[sonu samuel]

how can i convert LTE to volte in j5 prime bought from qator now iam lives in india
plzz help

 

[Almeuit]

how can i convert LTE to volte in j5 prime bought from qator now iam lives in india
plzz help

You don't -- your carrier has to support it and your phone has to support it.