Since 2013 Sony's flagships have been defined by the letter "Z." We've seen over 10 smartphones with the label, the latest of which were the Xperia Z5 Compact, Z5 and Z5 Premium, released last fall. That led many to expect that, at some point in 2016, an Xperia Z6 series would arrive to replace it. But that's not going to happen. Speaking to the British site uSwitch, a Sony Mobile senior product marketing manager confirmed that Sony "will not be releasing a Z6," adding that it's "turning to the next stage with the Xperia X series." We reached out to Sony for confirmation of the statement (it's made similar remarks to other publications) but it makes a lot of sense.