The Sony Xperia Z is an Android-based smartphone by Sony. Announced at CES 2013 the phone was officially released on 9 February 2013 in Japan and 1 March 2013 in Singapore and the UK. It was released in the U.S months later. The Xperia Z was initially shipped with the Android 4.1.2 operating system. The smartphone has Ingress Protection Ratings of IP55 and IP57. It also contains a 13.1 MP Exmor RS camera sensor, and the screen of the phone consists of a TFT 1920x1080 display, with 441 ppi. It would be the first smartphone in the Sony Xperia Z series, continuing all the way up to the Xperia Z5.