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Best of Mobile World Congress 2014

It's the world's largest event dedicated solely to mobile technology. Mobile World Congress brings together some of the biggest names in tech from around the globe to show off innovative, exciting and forward-thinking products. We joined the 72,000 other folks from 79 countries in Barcelona, slogging it out on the show floor to uncover the most compelling innovations. From futuristic fitness gear to the world's smallest camera, these are the five most groundbreaking items from Mobile World Congress 2014.

1. Second-generation YotaPhone

Why should your smartphone be limited to a single screen? The second-generation YotaPhone changed the rules of handset design by packing a sleek e-paper display on the back, and the second generation adds color and touch. The Android device has a 4.7-inch, 960 x 540 screen on the rear, which you can use to view notifications, glance at the weather, and keep up with the news without having to wake up or unlock your device. The YotaPhone's Smart Power Mode allows you to use the rear screen as your primary phone to save battery. This 5-incher has plenty else to offer, including a 1080p display, a quad-core Snapdragon 800 processor and an 8-MP camera. 
MORE: YotaPhone Gets Secondary, E-Paper Display: Hands-on

2. Samsung Gear Fit

Wearing the Gear Fit feels like you're living in the future. The 1.8-inch curved AMOLED touch display is the first of its kind for a mobile device, enabling users to swipe around the colorful interface with ease. In addition to a pedometer, a built-in heart rate monitor helps you keep tabs on your progress during workouts. You can also remotely control the media on your phone, as well as receive notifications, including calls, emails, texts and appointments. The changeable straps (available in black, orange and gray) let you add a dash of style, and the whole design is water resistant.
Samsung Gear Fit Offers Gorgeous Display, Built-in Heart Monitor

3. Rambus Lensless Smart Camera  

We've heard of mirrorless cameras, but what about a lensless one? A prototype smart camera sensor, revealed by Rambus researchers, does away with lenses completely, capturing images through the power of algorithms alone. This gives the shooter a super-slim girth of just 200 microns -- or three human hairs -- wide. While the product is still just a proof of concept, this technology could be a game changer for several industries, from home security and wearable computing to medical imaging.
Rambus' Tiny Lens-Less Camera Hands-on

4. Lenovo SHAREit

Sure, you can share your files online, but when you need to send something from your Android phone to your friend's iPad and your wife's PC laptop in record time, Lenovo SHAREit could be your best option. SHAREit is available free for Android, iOS, Windows and Mac OS X and allows you to share files with single users or entire groups over a speedy Wi-Fi direct connection, no network required. You can even use the group feature to form an instant peer-to-peer chatroom or the PC connection to remote control your presentations from your handset.
MORE: Lenovo's SHAREIt App Hands-On

5. Intel Merrifield Platform

It's the more, the merrier for Intel. Or in this case, Merrifield, the company's latest chip for mobile devices. With its sights firmly set on the competition, Intel claims the dual-core CPU will deliver more performance with less power consumption, thanks to the company's 22 nanometer process. In early tests, Intel has defeated processors from Qualcomm and Apple in performance and battery life. When it launches, Merrifield will run at speeds up to 2.13-GHz with a speedy PowerVR G6400 graphics processor. It will also support up to 4GB of RAM, 256GB of Flash storage, 13 megapixel cameras and Android 4.4.2 (Jelly Bean). If Merrifield lives up to the hype, the mobile market will be very merry, very soon.
MORE: Intel Merrifield Reference Phone Hands-On