The Sony Xperia Z4 could be out as early as March 2015, rumors suggest, and the specs and features speculated for the device still keep coming.

There are lots of rumors about Sony's next flagship smartphone but below are some which make the Z4 even more worth the wait.

QHD Display

Air Herald said that the much-anticipated screen was originally rumored for the Sony Xperia Z3 but it never came. Fans are now waiting for Sony to roll out the next generation Z smartphone with 2560 x1440 resolution display at 5.5 inches.

Powerful Camera

Sony is also alleged to ship the Z4 with a 27 megapixel rear camera and a 10 megapixel front snapper, added Air Herald. The rumor "boosts this phone as one of the top powerful camera phones," said the report.

Android Headlines added that a tipster from China leaked "a document mentioning IMX189AEG CMOS image sensor and its specifications."

"According to the document, this will be world's first high-speed and high-sensitivity CMOS image sensor with active pixel color sampling," said Android Headlines. "This sensor will support 2K video imaging (2048 x 1080, 16,000 frame/s) and a high-speed 4K video mode (6144 x 2160, 240 frame/s)."

Qi-Wireless Charging

According to Android Origin's source, the Sony Xperia Z4 will have Qi-wireless charging support. The outlet said that the new charging port will replace Sony's usual magnetic charging port for the smartphone.

Flap-Less MicroUSB Port

The Sony Xperia Z4's will reportedly ditch the microUSB port flaps of the Xperia Z, which Android Origin says "seem to loosen with time, compromising the water resistance of the device." Still, the Z4 will allegedly still be water resistant.

Powerful Processor

The Z4 is just as impressive on the inside as it is on the outside. Air Herald speculates that it could come with "Qualcomm Snapdragon 810, an octa core with a 2.7GHz clock speed max." Provided such rumor is true, the Sony smartphone will be home to four Cortex A54 and A57 cores plus 4GB RAM, Air Herald added.

Trusted Reviews predicts that the Sony Xperia Z4 release date be March 2015, based on the timeline provided by Sony's director of Xperia Marketing Calum MacDougall. "The replacement ratio [on our flagship phones] is about six months," he told the outlet. The Z3 was released Sept. of this year.

Specifically, a Mobile World Congress 2015 reveal could be in order for the Sony Xperia Z4, as with the Z2, Tech Radar noted.