The phone was announced by Sony at CES 2013 and was released on 9 February 2013 in Japan and 1 March 2013 in Singapore and the UK. The Xperia Z was initially shipped with the Android 4. 1. 2 (Jelly Bean) operating system. The smartphone has Ingress Protection Ratings of IP55 and IP57, making it dust protected, low pressure water jet protected, and waterproof, which allows for immersion under 1 metre of water for up to 30 minutes, and features a 13. 1 MP Exmor RS camera sensor as well as a full HD (1080p) display, encompassed in Sony's 'Omni-Balance' Design.