This number called my unlisted business cell phone number. Display showed Frederick, MD. I didn't answer and they didn't leave a voice mail.

Credit card scamming low-life.

An apparent scam telling you that it is urgent that you speak with someone for some deal to lower interest rates on your credit card account? I don't use credit cards anyway. Not having one gives me very low interest rates. Unless they give me money for being in debt, I'm not interested and don't believe random robocalls are urgent.

Called, no message. Others report credit card scam.

This number just call my business, when I say hello, the caller keep quiet but does not hang up so I hang up, caller ID show Frederick, MD.  A scam again!!!