Sony unveiled today its premium Xperia Z3 smartphone, which is lighter as well as thinner than its predecessor. In terms of height and width dimension the new device has not changed. The Xperia Z3 is thinner at 6.9mm as opposed to 7.3mm. It also weighs less, just 144g rather than 152g. Sony has upgraded the processor of the new phone from a quad-core to an octa-core Qualcomm Snapdragon 801 processor. However, it comes with same 3GB of RAM. It sports a 5.2-inch Full HD 1080p triluminous display and is mounted with a 20.7-megapixel of front-facing camera.