Cell phone maker Motorola Inc. said Wednesday it will cut another 4,000 jobs as part of a plan aimed at improving sagging operational results. The company already is in the process of eliminating 3,500 jobs as part of a two-year, cost-cutting plan to save $400 million. Those layoffs, announced in January, are to be completed by June 30, Motorola said. It said will save another $600 million in 2008 by cutting 4,000 more workers, prioritizing investments and putting controls on discretionary spending and general and administrative expenses.