Sony Xperia Z3 is just two months old but it seems Sony has already started working on its successor the Xperia Z4. Sony is said to have given up on its six month release cycle for flagship handsets starting with the Xperia Z4. So far, it has been the only company to push out two flagships per year. (take the Z2 and Z3 from 2014)
Sony Xperia Z4 will feature a octa-core Snapdragon 810 processor clocked at 2.8GHz with 64-bits support. The octa core CPU will be paired with Adreno 430 Graphics unit. The phone will sport a 5.5-inch QHD screen resolution at 2560 x 1440 pixels combined with 4GB of RAM and the internal storage will be 32GB.
Sony will drop the IMX220 20.7 megapixel camera sensor which is in use since the Xperia Z1 and will rather reportedly go for a curved Exmor RS CMOS sensor having similar resolution as the previous Xperia Z series flagships.
This Xperia also might be the first one to feature Cat.6 LTE connectivity and Bluetooth v4.1 and a dedicated amplifier for better audio quality. The Xperia Z4 is apparently going to be introduced around March next year, probably at Mobile World Congress.
