VoLTE (HD Voice) FAQ's
* Will my calling areas be restricted after I add HD Voice?
No, your calling areas won't be restricted as a result of enabling HD Voice. You can make or receive HD Voice calls as long as you're connected to our 4G LTE network. Even when you're out of 4G LTE coverage area, you can still make or receive voice calls in the US.
While traveling abroad, you can still make or receive voice calls on our roaming partners' CDMA or GSM networks.
Note: While using HD Voice, your calling experience m...