Note, check the My Verizon App each morning to claim your offer while supplies last. No credit is required for this reward. Valid while supplies last. This was available to me today, but I am not sure if it was a targeted offer as I have recently been searching this phone on the app, so YMMV
Log in to the My Verizon App
From the My Verizon App, tap on the upper left drop down menu
Select Verizon Up
Find the offer under "Bonus Rewards" or "More Rewards"
Claim the current offer: $400 off IPhone XS