How to enable VoLTE in Samsung Galaxy S7 in india...? I have a galaxy s7 bought from uae.I need to enable volte services for reliance jio in india.
 It was having android noughat 7.0 uae version. I tried to install indian version noughat 7.0 which  gave me an error of "SW VER CHECKFAIL....... " 

after googling a lot i understood that boatloader cant be downgraded to previous version. unfortunately i think the latest indian version is far behind the uae version.

So i just omitted BL file while odin installation and flashed the rom. Then i dont have imei and mobile network became unusable.

Now i flashed latest Malaysia version oreo (android 8). But still volte is not working..
Any idea whats happening...?
Samsung Galaxy s7 is an LTE device and not VoLTE. But if you still want to make voice calls over LTE, you can download jio 4G voice app from https://www.jio.com/en-in/apps/jio-4g-voice  . 

It is very user friendly app,still in its beta phase. But it lets you enjoy all the features of VoLTE while you are in LTE.