Report: DoCoMo, Cingular to link on 3G technology TOKYO -- NTT DoCoMo Inc. has decided to work with Cingular Wireless LLC on 3G (third-generation) cellular telephone technology following the latter's acquisition of NTT DoCoMo's current U.S. partner, AT T Wireless Services Inc., the Nihon Keizai Shimbun business daily reported in its Thursday morning edition.