With the announcement of the Xperia X series of phones at this year's Mobile World Congress event in Barcelona, many Sony fans have been left wondering what happened to the Z series of phones. Some took to Sony's social media accounts to ask, to which Sony's German social media presence confirmed the X series will replace the Z Series. Translated German comment: "Hi Sarah, there will be no Z6. The new X series is under a modified concept that meets the needs of our users even more. You can of course still rely on the latest technology in our smartphones - which has nothing to do with the name. Best regards, your Sony team."