AT&T Chicago store (interior 001)

United States carrier AT&T said yesterday that some of its customers in select areas can now make Voice-over-LTE (VoLTE) calls to users on other carrier networks. Cross-network VoLTE calls are currently supported for just one unnamed carrier, but AT&T will eventually implement support for multiple carriers.

Unlike traditional calls that use a carrier’s voice network (which is separate from a 3G/4G data network), VoLTE calls use a 4G Long-Term Evolution (LTE) network, resulting in crisp sound quality and optimized bandwidth use.... Read the rest of this post here

"Some AT&T customers can now make VoLTE calls to people on other carrier networks" is an article by
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