I too received a call from 405-200-7641 on my cell phone and they left no message. First of all, you can add your cell phone to the DO NOT Call list (www.donotcall.gov), which I did a long time ago. Previously I had daily calls from another number on my cell phone. Once I reported that number to the Do Not Call List, the calls stopped. After I finish posting this, my next stop is to www.donotcall.gov, so that I can report 405-200-7641. I suggest you do the same as their is strength in numbers !
They sent me a text message this morning. Saying my card had been "deactivated." I called the number and all it asked for was my card number. Didn't specify bank card, credit card etc. Please don't give these scam artist your info!