Enable 4G HD Voice (VoLTE) on True SMART 4G P1 Series
- On main screen, tap ^ to view all Apps
- Tap (Settings) > (Network & Internet)
- Tap (Mobile network) > (Advanced)
- Tap turn on (VoLTE HD Call) when it's ready to use, VoLTE sign will appear above 4G
- When making call or receiving call, HD will appear at the left of call duration
- Call History : if it is a call via VoLTE, there’ll be HD sign
- When making call or receiving call via VoLTE and VoWiFi almost the same time and to check call detail, tap that number and then (Call details)
- HD = via VoLTE
- Fan sign = via VoWiFi