Coolest tech to see at Barcelona's Mobile World Congress

A visitor uses a "Daqri smart helmet" during the Mobile World Congress in Barcelona, Spain.

A visitor uses a VR device during the Mobile World Congress on the third day of the MWC in Barcelona, March 1, 2017.

A visitor uses a VR device during the Mobile World Congress on the third day of the MWC in Barcelona March 1, 2017.

A man checks a HTC smart device during the Mobile World Congress.

A visitor tests an 'amplified experience' device at the vehicle manufacturer Peugeot stand on the second day of the Mobile World Congress on Feb. 28, 2017 in Barcelona. Phone makers will seek to seduce new buyers with artificial intelligence functions and other innovations at the world's biggest mobile fair starting today in Spain.

A visitor walks as he uses his mobile phone at the Mobile World Congress on Feb. 28, 2017.

A robot dances on a Chinese mobile company's stand during the Mobile World Congress.

A man ties out QUALCOMM smart glasses.

People look closely at the new BlackBerry KeyOne.

A man tests a pair of Lenovo smart glasses.

A man makes a selfie with a robot in the stand of Ubunto.

A man checks his mobile device during the Mobile World Congress.

People make selfies at the Sony exhibit during the Mobile World Congress.

This visitor enjoys a Samsung VR virtual reality experience.

Visitors at the LG Watch display.

These women pose next to the "cognitive dress", made in fabric flowers embedded with LEDs which lite up in different colors.

At the Qualcomm Snapdragon 835 processor virtual reality experience.

Visitors take pictures with a ZTE Axon7 at the company's booth.

A visitor tiies out the "Korea VR Tour."

A Crosscall Trekker-X3 smartphone is frozen inside a block of ice.

This are Samsung Gear VR glasses.

Visitors look at the new Sony Xperia XZ.

Visitors enjoy a Nokia OZO virtual-reality experience.

The Samsung VR virtual-reality experience.

Chief Marketing Officer of Samsung Electronics Europe David Lowes presents the tablet Samsung Galaxy Book during a news conference Feb. 26, 2017, in Barcelona on the eve of the World Mobile Congress official opening. Phone makers will seek to seduce new buyers with even smarter Internet-connected watches and other wireless gadgets as they wrestle for dominance at the world's biggest mobile fair.

A person holds Nokia's new phone "Nokia 6" after its presentation in Barcelona on the eve of the start of the Mobile World Congress.

Journalists test the Samsung Galaxy Book after its presentation.

Attendees check out the new re-launched Nokia 3310 phone, during a Nokia presentation ahead of Monday's opening of the Mobile World Congress wireless show in Barcelona, Spain.

Juho Sarvikas, Chief Product Officer of HMD Global, shows the new Nokia 3 smartphone.

Samsung's Head of product management and portfolio, Mark Notton, presents the new Galaxy Tab S3.

Telefonica's Chief Data Officer, Chema Alonso, presents 'Aura', a new platform based in cognitive intelligence.

A visitor takes a close look at the new Nokia 3310.

Visitors take a look at the new Nokia 3310.

President of Telefonica, Jose Maria Alvarez-Pallete, presents 'Aura', a new platform based in cognitive intelligence.

Vice president of Samsung Electronics America, Alanna Cotton, talks about the company's novelties on the eve of the opening of Mobile World Congress.

Journalists check the new model of the Huawei phone P10, following its presentation on Feb. 26, 2017 on the eve of the start of the Mobile World Congress. Phone makers will seek to seduce new buyers with even smarter Internet-connected watches and other wireless gadgets as they wrestle for dominance at the world's biggest mobile fair starting tomorrow.

Huawei's new Watch 2 4G is on display after its presentation in Barcelona on the eve of the start of the Mobile World Congress.

Arto Nummela, Chief Executive Officer at HMD Global, shows the new re-launched Nokia 3310 phone.

People take selfies outside the Mobile World Congress in Barcelona on Feb. 25, 2017, before the start of the world's biggest mobile fair, held from Feb. 27 to 2 Mar.

Two policemen stand guard outside the Mobile World Congress centre in Barcelona.

Chinese multinational networking and telecommunications equipment and services company Huawei's CEO Richard Yu presents the new Huawei Watch 2 4G during a press conference on the eve of the start of the Mobile World Congress. Phone makers will seek to seduce new buyers with even smarter Internet-connected watches and other wireless gadgets as they wrestle for dominance at the world's biggest mobile fair starting tomorrow.

A person holds the new LG G6 model made by LG after its presentation in Barcelona.

LG's president and CEO, Juno Cho, presents the company's new model LG G6 during a press conference on the eve of the official start of the Mobile World Congress in Barcelona.

Speaker Georgie Barrat gestures during the presentation of LG's new model LG G6 on the eve of the official start of the Mobile World Congress.

A journalist takes a photo of the new model LG G6 by LG after its presentation on the eve of the official start of the Mobile World Congress in Barcelona.

Journalists take photos of the new model LG G6 by LG after its presentation.

Members of the public take pictures before the presentation of the new phone Huawei P10 Plus.

Attendants hold the new G6, unveiled by LG as its next phone, ahead of Monday's opening of the Mobile World Congress wireless show.

Attendances use their phones to take images of the new G6 unveiled by LG.

TCL Communication's CEO Nicolas Zibell presents the new BlackBerry KEYone before the Mobile World Congress.

Chief executive officer of consumer devices division for Huawei Technologies Co., Richard Yu, presents the new phone Huawei P10 Plus before the Mobile World Congress.

Italian photography director Vittorio Storaro delivers a speech during the presentation of the smartphone LG G6.

LG Mobile Communications' President Juno Cho, 3rd from left, and LG's top-rank officials attend the presentation of the new smartphone LG G6.

Visitors discuss the new device behind the new smartphone LG G6.