AT&T Sim to Verizon 4G LTE
I understand that all 4G Verizon phones are unlocked by default (other than if they're on a prepaid plan). I recently tried to move a SIM on network plan to a Verizon 4G LG Smart Phone. AT&T store rep tells me that because the Verizon phone uses a different networking protocol CDMA than AT&T, the SIM card won't work, even if they prepare a properly sized one for me. Does this ring true or have I missed something?