$500 via Verizon e-gift card (sent w/in 8 wks). Activation of 4G LTE/5G phone on One Unlimited for iPhone (all lines on account req'd on plan), 5G Do More, 5G Play More or 5G Get More plans req'd. Device must remain active for 45 days. $500 charge back if service cancelled w/in 12 mos or eligibility req's are no longer met. See vzw.com/bring-your-own-device for details. And for a limited time, we’ll waive your activation fee when you order through vzw.com or My Verizon app. You’ll see the one time charge waived as your “Due Today” amount at checkout.
In the billion or so years I've been on Verizon, I dont think I've ever gotten a notification from them about free premium trials. They come from the networks themselves, and yes you do have to be lucky enough to see them. You could try checking your messages in the main menu, but I can't guarantee there will be anything about it there.