You can make High-Definition Voice and Video Calls, and surf the web while talking on the phone, when you add Advanced Calling to your line. Visit verizonwireless.com/AdvancedCalling to learn how.
Activating Advanced Calling
Tap Home > Settings > Network & internet > Advanced Calling.
Tap Wi-Fi Calling On/Off to turn on or off.
Choose HD Voice and Video calling or HD Voice Only.