An AT&T COR DF charge on your credit card, debit card, or bank statement most likely identifies a transaction processed by AT&T for a wireless device, accessory, equipment order, sales tax, down payment, or another order-related purchase. The descriptor is commonly searched as AT&T COR DF Dallas TX, AT&T COR DF Atlanta GA, ATT COR… Continue reading AT&T COR DF Charge on Credit Card or Debit Card