Other Charges and Credits - Continued AT&T Unlimited Plus Multi Line for Business 1 Gigabyte (GB) * 20.24MB. 1 Megabyte (MB) 1024K8 Roaming 6. KB Data Overage 1,634 3.27 Gigabyte (GB) a 10.24148. 1 Megabyte (MB) a 10241W Surcharges and Other Fees 7. Administrative Fee 8. Federal Universal Service Char