Just got a call from the same number. The message I received told me to log onto verizonthankyou.com for a $100 towards my next phone bill. I checked it out and as much as I could tell the page was a mirror image of the actual verizon website. The difference was in the log in menu, which looked similar to Verizon's site, but asked for more info. The links on this fake page seem to send you to the real Verizon page from what I could tell.
They left a partial message in my voice mail about Verizon and a $100 credit. Called back, and got a voice mail message that was breaking up like cell phone with poor coverage.
Same number. 303-731-3432. Same message, verizonpromo.com. I immediately google things like this, as it's very fishy. Did not attempt to go to site, or call # back.
Yeah I just got this exact same call today, not 15 minut the samees ago. It was a prerecorded voice telling me the same thing it told all of you "$100 of your verizon account bill" Luckily for me the website had already been taken down and I wasn't tricked into giving them my information