Celebrating technological advancement

Visitors walk past the Qualcomm stand at the Mobile World Congress in Barcelona. (Reuters photo)

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Visitors walk past the Qualcomm stand at the Mobile World Congress in Barcelona. (Reuters photo)

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1/10 Visitors walk past the Qualcomm stand at the Mobile World Congress in Barcelona. (Reuters photo)

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Visitors walk past the Qualcomm stand at the Mobile World Congress in Barcelona. (Reuters photo)

2/10 Visitors walk past the Qualcomm stand at the Mobile World Congress in Barcelona. (Reuters photo)

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A visitor walks past an advertisement on the Qualcomm stand at the Mobile World Congress in Barcelona. (Reuters photo)

3/10 A visitor walks past an advertisement on the Qualcomm stand at the Mobile World Congress in Barcelona. (Reuters photo)

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People walk around Hall 3 at the Mobile World Congress in Barcelona. (AFP photo)

4/10 People walk around Hall 3 at the Mobile World Congress in Barcelona. (AFP photo)

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Visitors look at Samsung devices at the Mobile World Congress in Barcelona. (AFP photo)

5/10 Visitors look at Samsung devices at the Mobile World Congress in Barcelona. (AFP photo)

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A Sony Xperia Z2 smartphone and a Sony Xperia Z2 tablet are displayed at the company's stand during the Mobile World Congress in Barcelona. (Reuters photo)

6/10 A Sony Xperia Z2 smartphone and a Sony Xperia Z2 tablet are displayed at the company's stand during the Mobile World Congress in Barcelona. (Reuters photo)

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Facebook chief executive officer Mark Zuckerberg smiles as he arrives at the stage to deliver a keynote speech during the Mobile World Congress in Barcelona. (Reuters photo)

7/10 Facebook chief executive officer Mark Zuckerberg smiles as he arrives at the stage to deliver a keynote speech during the Mobile World Congress in Barcelona. (Reuters photo)

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Visitors follow on a huge display Facebook's 29-year-old billionaire creator Mark Zuckerberg speaking on the opening day of the Mobile World Congress in Barcelona. (AFP photo)

8/10 Visitors follow on a huge display Facebook's 29-year-old billionaire creator Mark Zuckerberg speaking on the opening day of the Mobile World Congress in Barcelona. (AFP photo)

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New Samsung Galaxy S5 smartphone, Gear 2 smartwatch and Gear Fit fitness band are displayed at the Mobile World Congress in Barcelona. (Reuters photo)

9/10 New Samsung Galaxy S5 smartphone, Gear 2 smartwatch and Gear Fit fitness band are displayed at the Mobile World Congress in Barcelona. (Reuters photo)

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JK Shin, president and head of IT and Mobile Communication Division of Samsung Electronics, waves on stage at the Mobile World Congress in Barcelona. (Reuters photo)

10/10 JK Shin, president and head of IT and Mobile Communication Division of Samsung Electronics, waves on stage at the Mobile World Congress in Barcelona. (Reuters photo)