These scammers use different numbers claiming to represent banks and want to lower your credit card rate. Never said which bank. They are likely after your credit card number....
https://www.everycaller.com/phone-number/1-718-844-2866/
Received a call from 718-844-2866 June 4, 2015. No voicemail. I called back and got a voicemail - Indian dialect.
No clue who the person was. I hung up and will ignore future calls.