Well, after numerous rumors and leaks, the Sony Xperia Z4 is officially here although the Japanese electronics giant has announced it only for its home country Japan at present which is a bit surprising. Also, Sony’s new flagship has only a few noteworthy improvements over its predecessor, the Xperia Z3.

The new Sony Xperia Z4 features a 5.2-inch triluminos display with a resolution of 1920 x 1080 pixels and a pixel density of 424 ppi. Under the hood it has a 64-bit Qualcomm Snapdragon 810 octa-core 2.0GHZ/1.5GHz processor, 3GB of RAM and 32GB of internal storage expandable up to 128GB via a microSD slot.

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The primary camera will be the same 20.7MP Exmor RS with LED flash but no OIS (optical Image Stabilization) as yet. However, the rear camera has a new “cooking mode” that helps users to take great shots of food. The handset will have a 5.1MP front-facing camera for selfies and video chats.  The smartphone will draw power from a 2930 mAh battery and it will come with Android 5.0 out-of-the-box.

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Dimensions of the new Sony Xperia Z4 are 146mm × 72mm × 6.9mm and it weighs 144 grams. This means it is 4mm thinner and 9 grams lighter compared to Xperia Z3. Its frame is made of polished metal and it is IPX5/IPX8 certified for water resistance and IPX6 for dust resistance. IPX5 means it can withstand 12.5 liters/min of water projected from all directions through a nozzle of 6.3mm diameter from 3m distance for minimum 3 mins.  IPX8 means the phone can be submerged in tap water at room temp. up to 1.5 meters for 30 mins.

Sony Xperia Z4 will be available in four color options – White, Black, Copper and Aqua Green. Accessories include a waterproof cover with window available in four colors matching those of the handset. You can receive a call as well as operate the camera and music player with the cover on. The cover is priced at 7,000 yen (about $59) plus tax. A black desktop holder will also be available to hold the phone and charge it.

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Sony Xperia Z4 will be available “later this summer” but for now, only in Japan. There is no word from the company about its global release or pricing.