keywords: cingular blackberry carrier wireless affiliates
text: Cingular Wireless Selling Interactive Unit Cingular Wireless plans to sell one of its older wireless data networks to a group of private investors for an undisclosed sum.   The cell-phone company said Monday it will sell the unit -- the carrier of data for Blackberry e-mail devices, among other things -- to affiliates of New York private-equity firm Cerberus Capital Management LP...