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.
AT&T WirelessÂ® Customer Service Phone Number: 1-800-331-0500. AT&T Wireless is one of the largest U.S. mobile carriers. They offer 4G service and the latest smart phones like the Apple iPhone and Samsung Galaxy S Series. AT&T Wireless Corporate. 208 South Akard Street.