Some of the biggest smartphone launches of the year are taking place in Barcelona, while a host of other gadgets are also on show.
Updated: March 03, 2015, 12:00 AM
Mobile World Congress 2015 – in pictures
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