As the world's largest mobile phone fair hosts the "creme de la creme" in Barcelona, activists slam the dark side of a sector accused of ignoring rights abuses in Chinese factories and Congolese mines. Just a few blocks from the main Mobile World Congress (MWC), the so-called Mobile Social Congress has even showcased its very own superstar smartphone -- the Fairphone 2, which a Dutch firm tries to manufacture as ethically as possible. "Traceability is quite a difficult issue," recognises Daria Koreniushkina, public engagement manager at Fairphone.



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