SCHAUMBURG, Il – Profit fell 84% to $100 million in the fourth quarter at U.S. mobile phone manufacturer as sales of its cell phone dropped 38% to $4.8 billion. The company though lost $49 million during the year. Motorola shipped about 1.5 million Razr 2 phones in the quarter, instead of the projected 2.5 million. Overall, Motorola sold 40.9 million phones compared with 65.7 million a year earlier. The company’s mobile phone unit lost $388 million on sales of $4.8 billion, compared with a profit of $341 million on sales of $7.8 billion the previous year. Net income in the...