A clarion of smartphone calls rang out at the opening of the Consumer Electronics Show on Tuesday, with Apple (AAPL), AT&T (T), Samsung and others making headlines. Apple never attends the Las Vegas event, but its CEO, Tim Cook, was in China for the second time since becoming CEO in 2011. He met with China's Industry and Information Technology Minister Miao Wei to discuss the development of China's telecom market. That's all Apple acknowledged in