They called my cell, then hung up without speaking. I called back from another phone - it's Santander USA. They service my car loan. This is the 3rd time this company has called and hung up for no reason, and I purchased my car less than 2 weeks ago. First payment isn't due for another month, so it's not collections.
Last time I returned the call, I was told they were "probably just verifying the validity of the number".
Same here... called and said nothing, then I heard a beep after my second hello, and they hung up. I just purchased a vehicle with them too, so that must be who it is.