While Sony hasn't given core details yet, the Xperia Z4 -- and a slew of its concept renders -- has sustained appearance in rumor headlines over the week.

Much to the delight of anticipating followers, the latest image leaks have sprung courtesy of @OnLeaks. You can check them out here, here and here.

French site nowhereelse has picked up the renders too, where the device's posterior can be seen. Interestingly, there is no Sony or Xperia logo printed on this side, suggesting that what we're seeing may not be the final build.

Looking at the Xperias' design language, the leaks appear to be very convincing. Tipster @OnLeaks himself clarifies, "As @OnLeaks, I share only exclusive high-quality leaks aiming high-end flagships from major smartphones / tablets manufacturers."

The leaks also suggest the inclusion of a mysterious port located at the bottom of the device, adjacent to the more predictable USB port. The hole is roundly elongated.

The Xperia Z4 is previously thought to ditch microSD card support, according to the International Business Times. However, the recent leaks indicate a single port flap, speculated to give room for nano SIM -- or a microSD card, after all.

Phone Arena has curated fresh Xperia Z4 renders as well. The outlet took note of a "curvy" concept, which "fattens" at its center. From a bird's eye view, it reminds us of the LG G Flex, and it's interesting to wonder whether the actual flagship takes on a different form factor.

Another concept reminds Phone Arena of the OnePlus One. It sports a 5.5-inch Quad HD display, Snapdragon 810, 4 GB of RAM and a whopping, 3500 mAh battery.

For those who haven't heard, the Xperia Z4 is initially pegged to arrive at the Mobile World Congress, alongside rivals Samsung Galaxy S6 and HTC One M9.

There had also been talks putting the Xperia Z4 at a rather save-the-best-for-last situation, as it is believed to be Sony's final smartphone.

As told by TechRadar, rumors have claimed differently about the Xperia Z4's display. Some have thought of a 5.5-inch screen; others predict a 5.4 inch panel, while some are convinced that the Xperia Z3's 5.2 inch display will stay.

For the smallest expected screen, suggested resolution comes at 1440 x 2560 pixels (565 ppi).

Other alleged specs include a 20.7 MP camera, 5 MP front snapper, 32 GB / 64 GB storage options, Adreno 430 GPU and Android 5.0 Lollipop support, GSMArena listed. Expected to arrive in Q2, the Xperia Z4 is speculated to sell for $1,250.

Will you give Sony's next flagship a try?