Filed under: CellphonesStan Sigman, the president and chief executive of AT&T's mobile phone business, has announced that it won't be long before he punches his last time card for the carrier. Reportedly, the exec revealed that he would be leaving to enjoy the luxuries of retirement after 42 years with the firm, and it was noted that Ralph de la Vega would be the man appointed to fill those shoes. Apparently, Stan will be staying on board in order to "assist with the transition through the end of the year," and John Stankey, the president of operations support, will take over De la Vega's prior role.
