Sony Xperia Z4 rumor round-up: price, specs, release date and features

This year's Mobile World Congress (March 2-5) in Barcelona, Spain, is going to be a blast! For all we know, Samsung, HTC, and Sony are eager to present their latest flagship smartphones and other mobile products to the world. The upcoming Xperia Z4 is definitely one of the superphones that 2015 will be remembered with. We've been blessed (at Sony's expense...) with enough leaked information to form a very good overall impression of how the fourth-generation Xperia Z-series is shaping up. So, if you don't like surprises spoiled, you better not read down the lines. Then ...