Fans of Sony mobile phones are jumping for joy. Namely, Sony introduced a (waterproof) family of Xperia Z5 smartphones, the smallest one being Xperia Z5 Compact, followed by Xperia Z5 and the largest one, the prestigious Xperia Z5 Premium. Regarding the latter one, manufacturer claims it's the first ever smartphone with a 4K Ultra-HD display and a 4K Ultra-HD video recording option.

All of the Z5s are very similar, but differ mostly in their displays and RAM. The Z5 Premium has a 5.5-inch display, the smaller Z5 has a 5.2-inch display and the smallest Z5, the Compact, has a 4.6-inch display. They all feature a 1/2.3-inch Exmor RS 23-megapixel image sensor with F2.0 G Lens and the world's fastest 0.03 second hybrid autofocus. This is the first re-design of the camera since the Xperia Z1.

All three Z5s have Qualcomm's Snapdragon 810 processor inside, up to 32GB of internal storage and a battery that's supposed to last up to 2 days. The Z5 Premium and Z5 have 3GB of RAM and the Z5 Compact only has 2GB. With a superfast charger, you can charge the battery in 10 minutes, making the phone work for another 5.5 hours. And a cute new feature: Z5's power button comes with a tiny fingerprint sensor.

Xperia Z5 and Z5 Compact will be available worldwide from October 2015 onwards, and a month later, in November 2015, you'll be able to purchase Xperia Z5 Premium as well.