While Long Term Evolution (LTE) is part of the GSM path, it will be the only cellular technology going forward. It has been introduced in data form by most carriers and in widespread use by Verizon. Voice over LTE (VoLTE) will eventually handle your voice calls as well.
Full Definition of CONDUCTIVITY. : the quality or power of conducting or transmitting: as a: the reciprocal of electrical resistivity b: the quality of living matter responsible for the transmission of and progressive reaction to stimuli.
The ability or power to conduct or transmit heat, electricity, or sound. The ability of a body structure to transmit an electric impulse, especially the ability of a nerve to transmit a wave of excitation. conductivity. The ability to transfer heat, electricity, or sound by conduction. See conductance.