Enable 4G HD Voice (VoLTE) on Samsung Galaxy S9+

  1. On main page swipe screen up
  2. Select (Settings)
  3. And then (Connections)
  4. Select (Mobile networks)
  5. Tap turn on (VoLTE calls SIM 1), if having 2 SIMs, (VoLTE calls SIM 2) will appear
  6. Wait a moment, VoLTE1 will show at top right corner, if SIM2 is used, it will be VoLTE2 and 4G HD Voice / VoLTE service is ready to use

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