Why can't I use my 4G phone on Verizon?

Doug bought a Tracfone LG Rebel 3 mobile phones. But the problem is, he can't get a phone number for it because Verizon doesn't support 4G anymore, only LTE. Whats the difference? Leo says that LTE is a bit faster, but it's odd that Verizon doesn't support it anymore. But they may have just killed 4G. Leo says to pull the SIM and try another carrier to see if it's not carrier locked. If it isn't, then go to Straight Talk.