I didn't pick up the call. Caller left a message. It was from Verizon Wireless. I had emailed them about some issue a few days before. Now, they're trying to contact me to resolve over the phone.
i've gotten 7 calls from that number in four days. And i happen to be an ATT customer, who's had the same number for 3 years. I think it's more likely a boiler-room technique to get you to call them so they can pitch you on switching.