Hoe can know if VoLTE feature is working on my phone ? Cuz my New sim ( Reliance jio) which shows VoLTE option in other phones, is not showing VoLTE option on mine .
on Google please have solved the problem by upgrading the firmware to Indian version. Samsung is now not bothered since you have already bought the phone. Samsung can provide the upgrade but they won't. Samsung customer care service is hopeless.