Intel's 4th quarter tumbles 27% Intel still beat earnings expectations for the quarter by 3 cents per share relative to analysts' expectations. Facebook tests voice-call appSocial network Facebook is testing voice calls in the United States on its Messenger application for Apple iPhone as it seeks to add more mobile services. Callers can use the app to make phone calls to friends over data networks instead of the voice service provided by traditional phone companies. patentsApple appeals for new hearingApple says a U.S. appeals court hobbled its efforts to protect patented designs and features against copying by Samsung Electronics Co., its biggest competitor for smartphones and tablet computers. The iPhone maker has asked the full complement of judges at the U.S. Court of Appeals for the Federal Circuit to review, at the same time, two appeals seeking to block sales of Samsung products that Apple says violate its patents.