8/25/1 at 8:45 am.  I am located in the Metro Detroit area of Michigan.   I didn't answer, and they left no message.  I got curious & called back, & right away there was a recorded phone message from my phone service carrier asking me to press 1 if I wanted to be removed from receiving calls from this number.  Strange!  Everytime one spammer stops calling another one takes their place!  Oh, well!

A recorded message saying that Heather is calling to let me know that I might be eligible for a lower rate on my credit card.
8/25/2015 9:13AM

I experienced the same thing as Doug.  A call from "Heather" and that they could lower my credit card rates.

Phone rang and I didn't pick up. No message

Robo call.  My credit card company doesn't have my employer issued cell phone number.  These scammers are on the hunt.  Reporting this incident to the company since there are other employees with similar numbers.