Enable VoLTE in Custom Roms for S7/S7 Edge

Hey there. So did you just install a Custom ROM on your Samsung Galaxy S7/ S7 Edge and lost your VoLTE support? Well, this is because those Custom ROM's are not country specific and you'll mostly find a note along with them asking you to flash your own country CSC (Country Specific Code) file. That is because every country may or may not have different cellular carriers which makes it really difficult for the creators of the Custom ROM's to add every country specific features. So they suggest you to flash your own CSC files after you have installed the ROM. So that is exactly what we will do. The process is exactly the same as flashing a ROM using your custom recovery but with a different zip file.

So all you need to do is follow the steps below and you'll have enabled VoLTE in no time with ease.

Step 1:

Go to THIS thread and download the CSC Zip file from the given link.

Step 2: 

Switch off your phone by pressing the power button. Then press Power button+Home button+Volume Up simultaneously to go to the Recovery Mode. Make sure you have installed a custom recovery already (TWRP Recommended).

Step 3: 

Now that you are in the recovery mode, swipe to allow the modifications.

Step 4:

After you swipe, you'll enter the main menu of TWRP. Click on Install, then browse for the downloaded zip file and swipe to flash it. 

Step 5: 

When you swipe to confirm flash, a new installer will appear called the Aroma Installer. So follow the instructions. Click on install CSC and select your country. Then flash it. After the flash is complete, reboot your device and you're good to go.