not able to find volte call option in iphone se

Hi singharun7,

The availability of LTE or VoLTE is determined by your carrier as seen in About the LTE options on your iPhone.

You can see what features your wireless carrier support by locating your carrier here Wireless carrier support and features for iPhone.

For assistance with this feature, contact your carrier directly.

Take care.

Since it's now required by most carriers, it's on by default. Unless your cellular carrier pushed out a carrier update giving you the option to disable it, it can't be turned off.