Warren Buffet never bought AT&T! He bought and owned DirecTV and so inherited AT&T stock when they closed the acquisition.
So many uninformed so called "journalists" posting #$%$ about how Buffet "soured on AT&T. WB never intended to own AT&T stock. He didn't own AT&T before the DTV acquisition and there is no reason to believe he would keep the shares afterwards. He made the decision to get rid of AT&T stock the day T closed its transaction.
Geez, one would think these "journalists" would invest 5 minutes and do some research before writing #$%$.