What to expect at Mobile World Congress: Samsung's latest Galaxy and 5G

Visitors walk past a 5G logo during the Mobile World Congress on the third day of the MWC in Barcelona, on March 1, 2017. The new year for smartphones is about to dawn. The South Korean electronics giant is is the headline exhibitor at the Mobile World Congress trade show that commences over the weekend, drawing some 108,000 attendees to the mobile industry's annual signature shindig. The S9 represents Samsung's turn to try and leapfrog Apple's most recent iPhones, as the rivals resume their bottomless battle for smartphone supremacy. Leaks point to a Galaxy phone with, among other features, an improved camera system.