I got the same "call this number, your attention is required" text that mn did. It goes to an automated system claiming that your "Visa Achieve Debit Card has been limited due to a security error" and then asks you to press 1 to get it re-activated. It then asks you to enter the 16 digit card number.
This is clearly a scam, as I don't have a Visa debit card of any kind, prepaid or otherwise.