The launch of Samsung’s S9 range of phones, and roll-out plans for 5G networks will be among the highlights for the Mobile World Congress starting February 26. U.S. imports of mobile phone handsets from South Korea and Vietnam – Samsung’s two main production centers – climbed 25% higher in December vs. a year earlier, setting a positive tone for recent sales. U.S. imports of phone network equipment only climbed 3% in the fourth quarter, suggesting a slowdown in investments ahead of new equipment availability. There’s a different picture for phone networks globally though, with Chinese ex...