Definition of mandible. 1  1a : jaw 1a; especially : a lower jaw consisting of a single bone or of completely fused bonesb : the lower jaw with its investing soft partsc : either the upper or lower segment of the bill of a bird.
Using other AT&T Payment Options. 1  1. Pay your bill via the automated phone system. Dial 1-800-288-2020 to access the 24 hour-a-day telephone customer service system. 2  2. Speak with a customer service representative. Once you have verified your phone number, the phone system will ask you what you would like to do.
Below is a list of toll free 800 numbers for AT&T. Orders, Customer Care, Billing,Tech Support: 1-800-331-0500 or 611 from your wireless phone. hours: Mon.-Fri.7 a.m.-10 p.m., Sat.-Sun. 7 a.m.-10 p.m. 1  Welcome to ATT, if you are calling about phone numbers [number called from] press 1.2  Main menu to pay your bills or get other bill related options press 1, 3  for technical support or help with voice mail press 2, a.m.-10 p.m. 1  Welcome to ATT, if you are calling about phone numbers [number called from] press 1. 2  Main menu to pay your bills or get other bill related options press 1, 3  for technical support or help with voice mail press 2,