PREVIOUSLY PUBLISHED TO TMCNET’S TELECOM SIGNALING RESOURCE CENTER Combining our favorite features from Facebook, Google Hangouts, Skype and iPhone systems, AT&T has been rolling out its new VoLTE service, which currently reaches more than 27 million subscribers in the United States. Allowing us to engage in improved calling quality, we are now able to utilize our LTE networks while in HD.    AT&T has been busy bringing simultaneous delivery of LTE connections to our communications […]