Xperia Z2
At Mobile World Congress in Barcelona, Sony announced a follow-up to last year's Xperia Z1 smartphone that's thinner, lighter, and slightly more powerful than its predecessor.

The aptly named Xperia Z2 still works underwater, though this one can record video at the enormous 4K resolution.

Key facts:

Screen - 5.2-inch 1920x1080 display
Under the hood - Quad-core 2.3GHz Qualcomm processor, and 3GB of RAM
Camera - 20.7-megapixel camera that can shoot video in 4K
Operating system - Android 4.4.2 (KitKat)
Special features - Waterproof (in fresh water, at least)
Release date - Available in Europe at the end of March. No plans for a US version currently