what network type is verizon
Because 4G LTE is a data-transmitting network, when it launched, Verizon customers' voice calls were still carried over the company's CDMA2000 network, which was developed for 3G cellphones. In September 2014, Verizon launched voice over LTE (VoLTE); this allowed voice calls to transmit via the data-only LTE network.
Since the network operators launched LTE networks, it's become a little easier. All LTE networks in the U.S. are built using GSM technology, so newer Sprint and Verizon LTE-enabled handsets include a SIM card and may work on all GSM networks, big and small.