Sony Mobile Japan announced the Xperia Z4 last week, however an international release was noticeably absent. A number of people have criticised Sony for releasing an iterative update to the Xperia Z3, with changes limited to the chipset, 5MP front-facing camera and cap less micro USB charging port. In particular, the design remains essentially the same.
Well given these issues, if Sony does plan to launch the ‘Xperia Z4’ globally it may decide to launch it as the “Xperia Z3+”. This comes from the white paper of the Sony SCR30 Style Cover Window accessory for the Xperia Z4. Compatible products for the case are listed as the “Xperia Z4/Z3+”.
The name would certainly be more appropriate given the iterative nature of the new handset. This would leave Sony able to reveal a more worthy successor to the Xperia Z3 later – most likely in the form of the Xperia Z5.
Update: Sony has pulled the white paper completely, adding credence to the rumouor.