Cardinal Recovery Group (also known as CRG) They are a collections agency, possibly for AT&T or other mobile phone companies. They not only call you but they call ALL the numbers you dialed from your mobile phone and the numbers of people who called your mobile phone (family, friends, work contacts, etc). Sneaky [***]. Notify your family, friends, etc NOT to acknowledge they know you or have your information. Plus, I believe it is not legal for them to call these people. They must obey the FCC and FTC rules.