They called and are trying to get info so they can slam your phone service. Do NOT give them any info. After we told them not to call back and hung up they called 4 more times right after. We told them again STRONGLY to not ever call us again. They called right back 3 more times which we just picked up and hung up the phone. Called our phone company to report and they said we have a block on our service so they can not slam our service.
From all appearances, this seems like a scam. At first, they make it appear that they're calling from Verizon. Then they speak about being your alternative to Verizon. Smells VERY fishy.