Have you verified you are attempting the setup in a brightly lit room and following the instructions?
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.
Face ID is a great security feature and we want you to take full advantage of it without any frustration. What problems are you having when setting up Face ID? Does the phone have any physical or liquid damage? Are you having any other problems with your device? The following link will take you the Apple support page for Face ID. http://spr.ly/6589DfnET
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