I found some people have lost Volte on their Honor 10 phones by flashing LastStandingDroid's img. (which may not be compatible with devices in India)
Below are the versions which you can use for India.
1. Download the attachment and place it in the same directory as your fastboot.
2. Make sure that you have unlocked the bootloader.
3. Run :
fastboot flash ramdisk col_al10_magisk_120.img
fastboot flash ramdisk col_al10_magisk_131.img
fastboot flash ramdisk col_al10_magisk_140.img
fastboot flash ramdisk col_al10_magisk_150.img
5. Install Magisk using Magisk Manager just to be sure.
(Please click on Thanks button instead of posting 'Thanks' as a reply. Helps keep the thread clean ! )
**WARNING** : I WILL NOT BE RESPONSIBLE FOR ANY DAMAGE TO YOUR DEVICE.
PLEASE DO NOT FLASH IF YOU ARE UNAWARE OF WHAT YOU ARE DOING
The patches have been created using Magisk. So BIG THANKS & Credit goes to Magisk Team for working hard and being so cool !