Sony has launched the new Xperia Z1F on NTT Docomo network in Japan. The Z1F is a variant of the company's current flagship - the Xperia Z1 - and brings many of the features in a more compact design. The main difference between the two phones is in the display. Whereas the Z1 has a 5.0-inch, 1920x1080 resolution LCD, the Z1F has a 4.3-inch, 1280x720...