VoLTE issue on Samsung Galaxy M31 has been reported successful. Today I got a phone call from Vodafone Customer Service assuring they're going to fix the issue of VoLTE by sending us a software update pack that may contain this fix. So we are soon going to enjoy this feature 🥳🎉🎊. Also idk if VoLTE issue resolved will we be ever going to enjoy VoWIFI service? 🤔 Let me know if you guys also reported this problem or not!
Update: they listened to me and they enabled VoLTE on Samsung Galaxy M31 device. Guys if you don't see the symbol then Go to Settings - Connections - Mobile Networks - VoLTE Enable on Sim 1 and do remind that you need to set your vodafone sim card to slot 1 for better performance. Here is a screenshot that proves VoLTE enabled on Samsung Galaxy M31 🤑