*HD Voice is not available in all areas. HD Voice Requirements: To experience HD Voice, both parties on the call must be located in an AT&T HD Voice coverage area and have an AT&T HD Voice-capable device and SIM with HD Voice set up on their account. Incompatible Services or Features: The following services and features are currently incompatible with HD Voice: prepaid service, Smart Limits, Ringback Tones, and OfficeDirect and OfficeReach (for business customers). HD Voice is available at no additional cost; standard voice rates apply and are charged according to your wireless rate plan.
HD Voice technology delivers high-quality voice calls across the AT&T 4G LTE network. With HD Voice you’ll experience clearer voice quality and reduced background noise. You can talk in a normal voice and be heard clearly even in noisy environments. Conversations will sound more natural, almost as if the person at the other end of the line is right there next to you. And with HD Voice, you can talk while surfing at 4G LTE speeds. 4G LTE and HD Voice are not available everywhere.
Yes. Currently, the following features and services are incompatible with HD Voice service: GoPhone® prepaid service, Smart Limits, Ringback Tones, and OfficeDirect, and OfficeReach (for business customers).
Smartphones sold by other carriers or direct from device manufacturers may not be eligible for AT&T HD Voice.