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.
I just called Verizon and they told me it is a scam. I also called the number and I got a recording that call cannot be completed as dialed which tells me that the caller ID number has been spoofed.
Also got the call 5 minutes ago, $120 "credit" to my verizon bill. Go to verizon120.com as is the MO its a phishing website. The registrar is Melbourne IT in australia, thats why it shows the creation date being tomorrow to us in the states. it looks like they make a new one every night and update their robocall.
Domain Name.......... verizon120.com
Creation Date........ 2012-06-25
Registration Date.... 2012-06-25
Expiry Date.......... 2013-06-25
Tracking Number...... 1729303229_DOMAIN_COM-VRSN
Organisation Name.... Isaac Ashong
Organisation Address. PO Box 61359
Organisation Address.
Organisation Address.
Organisation Address. Sunnyvale
Organisation Address. 94088
Organisation Address. CA
Organisation Address. US