 AT&T and BellSouth's Cingular brand, sponsor of Richard Childress Racing's No.31 car, was legally renamed AT&T upon BellSouth's acquisition by AT&T, and has been phased out.This is not allowed under the grandfather clause in the original sponsorship agreement between the former Nextel Communications (now Sprint Nextel) with NASCAR and on March 16, it was announced that AT&T had filed suit in Atlanta Federal Court seeking to overturn said grandfather clause because of this and allow AT&T decals on the car.