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It's the time of year when Barcelona becomes the global hotspot for technology and innovation. The annual Mobile World Congress (MWC) is the largest mobile-focused trade fair in the world and the place where many companies reveal their latest products. Huawei is expected to unveil a foldable 5G smartphone at a news conference on February 24, 2019. The 5G network is already available in certain small geographical areas, but it is expected to be developed in larger areas over the next few years.