Clark Kent had his own AT&T card which he often used in emergency situations.
On one occasion he used it in a phone booth to telephone London before some meeting was over. Lois Lane was worried they wouldn't make it back to the office in time to phone London, and she eagerly hailed a taxicab.
But Clark already had it taken care of in the phone booth thanks to his AT&T card.
AT&T in the real world
from the Real World
The company purchased Time Warner on June 12, 2018.