iPhone (iOS) devices:
To enable VoLTE on an iPhone:
1. Open the Settings app
2. Tap on Cellular or Mobile Service
3. Tap Cellular Data Options
4. Tap Voice & Data
5. Here you'll see the VoLTE toggle; switch it to On
Android devices:
To activate VoLTE on Android:
1. Open Settings
2. Find Network & Internet or Connections
3. Tap Mobile network or Mobile Networks settings
4. Toggle the switch for VoLTE.
