Voice over LTE has been one of the most highly anticipated network features to come along in recent years. As it stands, LTE is only used for data services, with voice being routed over legacy circuit-switched networks.The ability to offer voice over IP service via wireless offers operators a path toward a flatter, less expensive and more efficient network, with the ability to eventually sunset their 3G networks.

Operators have been talking about VoLTE for several years now, with expectations that roll-outs would begin last year in earnest — only they’ve been delayed again and again as carriers grapple with the real-world performance of VoLTE not being up to the quality expectations set by 3G networks.

At last week’s LTE Innovation Summit in Del Mar, Calif., it was clear that VoLTE is still coming together, and many pieces that have to work together in order to make this radical jump…

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