Sony at its MWC 2016 event introduced the new smartphone 'X' series with the launch of the Xperia X, Xperia XA, and the Xperia X Performance. While the company said the handsets would hit the stores this summer, it failed to give details about their pricing. However, the Xperia X and the Xperia XA have now been listed for pre-orders on an e-commerce website in the European region.