It's a Verizon "nag-o-matic" Probably done by a 3rd party nagging service and not directly thru Verizon (since the number is on a different carrier). Don't call them back, just pay your bill like normal. As long as you cover your past due, you shouldn't get any more of those calls.
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"The verizon wireless, calling about a status change to your account which requires immediate attention, please have...