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Courtesy of XDA member iRimas come some photos and rumored specs of a mystery Sony smartphone. The device in question belongs to the family Xperia and has the model number D6503. According to the leakster it sports a 5.2" display, thinner bezels than the Xperia Z1 and runs on a fresh new UI atop Android 4.3 Jelly Bean. The device is apparently unstable and the UI is crashing all the time but...

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