Beginning May 23, AT&T AT&T products and services are provided or offered by subsidiaries and affiliates of AT&T Inc. under the AT&T brand not by AT&T Inc is introducing High Definition (HD) Voice Limited availability in select markets. Deployment ongoing. Both parties on the call must have an AT&T HD Voice capable device, be located in an AT&T HD Voice coverage area, and have HD Voice set up on their AT&T account. HD Voice will be available at no additional cost. Additional restrictions apply. Learn more at www.att.com/hdvoice. on an all-IP, Voice Over LTE (VoLTE) network in select markets. At AT&T, you won’t have to choose between faster data speeds and crystal clear conversations. HD Voice customers can simultaneously talk while surfing the Web at 4G LTE speeds, all on the nation’s most reliable 4G LTE network Reliability claim based on third party data regarding nationwide carriers’ 4G LTE. LTE is a trademark of ETSI. 4G LTE not available everywhere.
– it’s the best of both worlds.