K30 5G VoLTE

[tamiya7676]

Hi All,

I have dual sims in my K30 5G where 1st sim having data package but 2nd sim without data package. I have enabled VoLTE via code. The problem is for my 2nd sim, sometimes I can get VoLTE with the HD sign but sometimes just cannot. From my previous phone experience VoLTE never fail in both sim. Any advice what should i set or is there any VoWiFi where I can switch on?

Thanks in advance