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Ina Fried Feb 26
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All the key news from the big cell phone trade show

Samsung unveils the Galaxy S9 ahead of Mobile World Congress in Barcelona
Samsung unveiled the Galaxy S9 a day ahead of Mobile World Congress. (Photo: LLUIS GENE/AFP/Getty Images)

The entire cellular industry, from phone makers to chip providers to carriers, are in Barcelona this week for Mobile World Congress.

Why it matters: The industry is spread out across the globe and Mobile World Congress provides the one big opportunity for the entire industry together. Below are the key announcements so far:.