LTE is a pure data network, which describes a hardware protocol, not the data being used to transmit it. Voice isn't explicitly integrated into the protocol like it was in "pre-4G" protocols where data was piggybacking on a protocol designed primarily for voice. It's the reverse.
“The basic layout of the HD2 is uncluttered and uncomplicated, providing only a few hardware buttons, and leaving the rest of the navigation up to that beautiful screen.”
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LTE is a pure data network, which describes a hardware protocol, not the data being used to transmit it. Voice isn't explicitly integrated into the protocol like it was in "pre-4G" protocols where data was piggybacking on a protocol designed primarily for voice. It's the reverse.