21.  Cellular companies are examining technology that will let them locate callers using special networks at cell sites.

22.  Companies like this buy air time at wholesale rates from larger cellular companies, then resell it at retail prices to consumers.

23.  Earlier this month, the Federal Communications Commission eased restrictions on how much spectrum can be controlled by cellular companies.

24.  Either kind is free or nearly so -- cellular companies are practically giving the phones away to drum up business.

25.  Existing cellular companies vigorously oppose the plan, although cellular resellers support it.

26.  Federal laws meant to insure privacy for cellular phone users were instigated by cellular companies, he said.

27.  For the established cellular companies, analysts said, this is a sobering taste of the intensified competition to come.

28.  GTE Corp., which operates local telephone and cellular companies around the country, is joining with Nintendo of America to develop new video games.

29.  If you stop your cellular service before the contract term expires, you may end up owing the cellular company several hundred dollars.

30.  In countries where cellular companies have been run by the local phone monopoly, typically a huge bureaucracy, that game plan usually is a success.