I have received several calls from the number 407-278-7021 requesting that we only VERIFY a change in our account and that they were NOT trying to sell a product. I work for a large lawfirm in Atlanta. I refused to verify anything without clearing with our AT&T account rep first.  "KIP" gave me a return number that he stumbled over while reciting and, much to my expectation, the number was disconnected. Our AT&T rep verified that this is NOT AT&T and that it is "ATT Solution Provider".  Due to FCC rules, other providers by law are permitted to review AT&T billing and offer/sell their services as well.  If you verify this change, you'll find that the service they want you to "verify" will be slightly different than what you actually have.  Thus, you have a new provider that will make the changes to your account and you are none the wiser.  BEWARE - TOTAL SCAM.