The following information is provided via Sprint:
VoLTE (Voice over LTE) is the next generation of voice service for your phone. Not only does it provide superior voice quality, it allows you to enjoy talk and data simultaneously.
And now that Sprint has joined the T-Mobile family, you have access to expanded coverage on the T-Mobile network with capable devices.
How To Turn On VoLTE
If your device is VoLTE capable, you can switch it “ON” by following the steps below.
By enabling VoLTE, you will get access to expanded coverage on the T-Mobile network with capable devices.
- Unlock access to expanded coverage on the T-Mobile network
- Make a voice call and surf the web at the same time
- Enjoy HD voice for enhanced clarity
- Available for most newer iOS and Android devices
Learn more here: https://www.sprint.com/en/shop/services/volte.html
As a long time customer of Sprint I love this feature!!!