iTweakiOS extends Apple iPhone HD voice hacks to AT&T network

The crew at iTweakiOS has released a hacked version of iOS for Apple iPhones on the AT&T network, supporting HD voice today on the 4S and 5 on the AT&T network.  It suggests AT&T will be supporting HD voice across all of its cellular network, not just the LTE portion.

A few weeks ago, iTweakiOS released a hacked version of iOS for devices on T-Mobile’s network adding HD voice support to the Apple iPhone 4 and 4S.

Release notes for the hack include the following; “AT&T is also currently in the process of enabling AMR-WB (AMR 13) which is the codec that enables HD Voice so you may not recieve [sic] HD Voice in every area but is set for public release sometime this year.”  This implies that AT&T will be turning up HD voice both on its 3G/HSPA network as well as delivering HD voice via Voice over LTE (VoLTE) sometime by the end of the year.

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