High-Tech Handhelds: Smartphones' nuts & bolts (VIDEO)

Check out all the latest from Mobile World Congress in Barcelona, including the world's first dual-screen Android smartphone.

Dive into the nuts and bolts of the voice and video engines that make IP telephony and round-the-world conferences possible.

Meanwhile, Russia's Internet powerhouse takes another swipe at Google with an alternative app store.

And one of the country's leading online game makers provides the inspiration for more enthralling comics and novels.