Sony Xperia Z and Xperia Tablet Z
A visitor looks at the new Sony Xperia phone and tablet through a glass window during the Mobile World Congress in Barcelona.Reuters

With less than a couple of weeks left before Sony's Munich event to kick-off, a news blog has leaked the key details of smartphone Xperia Z Ultra (aka Togari) which is rumoured to be making its debut at the event in Germany.

Sony-dedicated community website, XperiaBlog quoting a trusted insider revealed that the speculated device Xperia Z Ultra would sport a mammoth 6.44-inch screen with Full HD 1080p resolutions and boasts of a new display technology -Tri-luminous X-Reality for Mobiles - a notch upgrade from the BRAVIA Engine 2 which was last seen in the new Xperia ZR launched last month.

The new technology is expected to address the poor viewing angles and colour contrast levels observed in the previous Sony handsets.

Xperia Blog says that Sony has joined hands with a Swedish company, Neonde to put the new MultiSensing touch technology to the Xperia Z Ultra; new screen technology uses optical infrared light to enable the device to take input from stylus, pencils or any other input tool.

Other details include 8-megapixel main camera with Exmor camera technology and 2.2-megapixel secondary camera at the front. Despite its huge size, Sony Xperia Z Ultra will sport a very thin body measuring just 6.5 mm.

One key aspect of the new device, which is sure to enthrall Sony fans, is the 2.3GHz Qualcomm Snapdragon 800 series quad-core processor with Adreno 330 graphics engine.

Xperia Z Ultra is also pegged to come with water and dust-resistant body case with IP57/IP58 certifications which allows users to take pictures and video under water up to depth of one meter for close to 30 minutes.

Key specs of Xperia Z Ultra aka Togari:

Model Xperia Z Ultra(Togari)
Display 6.44-inch screen having Full HD 1080p resolutions,Triluminos display with X-Reality for Mobile technology
OS Android v4.2 Jelly Bean OS
Processor Qualcomm Snapdragon 800 chipset series quad-coreProcessor with a staggering 2.3GHz CPU speed
GPU Adreno 330 graphics engine
Camera Main: 8.0-megapixel camera with Exmor RS camera sensorTechnology

Front: 2.2-megapixel camera

Add-ons Water and dust resistant body case with IP55/IP58 certifications,Enable user take snapshots under water up to the depth of one meter

(Five feet) for close to 30 minutes.

Dimensions 179.2 x 92.0 x 6.5 mm
Weight 212 g