McCaw Cellular Communications Inc chairman Craig McCaw says talks are continuing with AT&T Co on an expected June signing of the deal for AT&T to acquire 33% of McCaw: he expects the deal to be completed by year-end 1993 at the latest; issues still under discussion include how to resolve the future of the Cellular One marketing brand name, which McCaw shares with Southwestern Bell Corp; McCaw will use AT&T’s name and it will have access to the skills of Bell Laboratories.