The images of the case appear to confirm what we saw in the leaked press renders from a couple of days ago. The TPU case features a cutout for that mysterious port, which sits alongside the microUSB of the upcoming smartphone.
Purported specs of Sony Xperia Z4 include Qualcomm Snapdragon 810 SoC, 5.2” QHD display, 20.7MP camera, and Android Lollipop. The smartphone features design cues from its both its predecessor and Sony Xperia Z2.
If the phones are delivered with 64-128gb of storage then I see no reason to have SD Card slot.
a small tip about misterious ports...think about something that all Sony (and Sony ericsson) phones have and its very usefull without being really a technology...