Some of the biggest smartphone launches of the year are taking place in Barcelona, while a host of other gadgets are also on show.
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Visitors look at the new Samsung Galaxy S6. David Ramos / Getty Images -
A woman uses Samsung Gear VR during the Mobile World Congress. Manu Fernandez / AP Photo -
A visitor walks in front of advertising of the new Samsung Galaxy S6 edge. The MWC 2015 is running from March 2 to 5 and is said to be the world's largest mobile technology event. EPA -
Visitors sample Sony wearable smart glasses. David Ramos / Getty Images -
A visitor looks at the new Samsung Galaxy S6. AFP -
A visitor tests a phone during the opening day of the 2015 Mobile World Congress. AFP -
Sundar Pichai, senior vice president of Android, Chrome and Apps, talks during a conference. AP Photo -
Visitors arrive during the opening day of the 2015 Mobile World Congress. AFP -
Visitors take photos each other during opening day. AFP -
A visitor uses a glasses device during the Mobile World Congress. AP Photo -
Visitors sample Sony devices during the first day of the Mobile World Congress 2015. David Ramos / Getty Images -
Visitors sample Sony wearable smart glasses. The company also unveiled its new Z4 Android tablet and M4 Aqua smartphone. David Ramos / Getty Images -
Chief executive of Deutsche Telekom Timotheus Hottges speaks during a keynote conference. David Ramos / Getty Images -
A visitor sits in front of the Nokia stand. David Ramos / Getty Images
Mobile World Congress 2015 – in pictures
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