Definition of derived. biology. : being, possessing, or marked by a character (as the large brain in humans) not present in the ancestral form derived features.
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.
Call AT&T Business Customer Service. Call Customer Service by tapping below if on your phone, or talk to them from your browser. Tap or click to call. Tap or click here to call (800-246-8464); Main Number for repair 24 hours quick response.