Mobile carrier looks for partners to cut cost of high-speed wireless network
                                
                                
                                    (Newser) -
                                    Struggling Sprint Nextel, burdened with layoffs, retail store closings, and massive mobile-subscriber defections to AT&T and Verizon, may be getting back in the game. The company, which recently caved to investor pressure to drop plans for a $5-billion nationwide WiMAX network, is again talking with Clearwire, its partner in...