Mobile World Congress Day 1 in Pictures

Visitors at the ZTE pavilion on the opening day of the World Mobile Congress in Barcelona. David Ramos/Getty Images
A delegate tries on Samsung's Gear VR headset. Pau Barrena/Bloomberg
A MaxCom Strong MM901 mobile phone, left, and a MaxCom Strong MM910 mobile phone sit in a fish tank to demonstrate their waterproofing capabilities. Pau Barrena/Bloomberg
Attendees sit in Silent Circle EarChairs. Chris Ratcliffe/Bloomberg
The Axon mobile phone, manufactured by ZTE Corp. Pau Barrena/Bloomberg
The new Samsung Gear 360, a 360-degree camera, excites the crowd. AP Photo/Emilio Morenatti
Ericsson's President & CEO Hans Vestberg shows a 5G chip. REUTERS/Albert Gea
Mobile phones with 5G on display at the Mobile World Congress. JOSEP LAGO/AFP/Getty Images
Mark Zuckerberg during his speech at the Mobile World Congress. AP Photo/Francisco Seco
China Mobile Chairman Shang Bing delivers a keynote speech. REUTERS/Albert Gea DAY
Will.I.Am, musician-turned-entrepreneur, speaks at the Telekom Unleashed event launching the Dial smartwatch. Chris Ratcliffe/Bloomberg
A woman using the new Samsung Gear 360, a 360-degree camera. AP Photo/Emilio Morenatti
A NAO humanoid robot powered by IBM. Pau Barrena/Bloomberg
Visitors check the new ZTE devices. David Ramos/Getty Images
An attendee takes a rest. Pau Barrena/Bloomberg
A man takes photographs of the new HTC One A9. AP Photo/Francisco Seco
A woman gives a thumbs up as she uses the new Samsung Gear 360. AP Photo/Emilio Morenatti
Delegates try a virtual reality submarine experience at the SK Telecom Co. stand. Pau Barrena/Bloomberg
A visitor takes a picture of 'Gear 360' camera at the Samsung stand. LLUIS GENE/AFP/Getty Images
A worker holds a Moto G mobile phone, manufactured by Lenovo, in a fish tank. Pau Barrena/Bloomberg
The Axon Watch, manufactured by ZTE Corp. Pau Barrena/Bloomberg
A worker displays a JAQ fuel-cell charger, manufactured by MyFuelCell. Chris Ratcliffe/Bloomberg
Details of Samsung's Galaxy S. Albert Llop/Anadolu Agency/Getty Images
Alt view of Samsung's Galaxy S. Albert Llop/Anadolu Agency/Getty Images
Visitors test models of the ZTE smartphones with 4K video. JOSEP LAGO/AFP/Getty Images
The Dial smartwatch at the Deutsche Telekom AG Unleashed event. Rob Dawson/Bloomberg
The Dial smartwatch from musician-turned-entrepreneur Will.I.Am's company. Rob Dawson/Bloomberg
Nokia's "Ozo" VR camera. JOSEP LAGO/AFP/Getty Images
Mark Zuckerberg as he arrives for a keynote conference. David Ramos/Getty Images
Visitors arrive at the Mobile World Congress. David Ramos/Getty Images