Some leaked documentation, allegedly belonging to Japanese carrier NTT DoCoMo, is referencing the specs of the local version of the Sony Xperia Z1 (SO-01F) as well as a device dubbed Sony Xperia Z1 f (SO-02F). It's believed that the Z1 f is actually the long-rumored Xperia Honami mini. The smartphone is said to shares the quad-core 2.2 GHz Snapdragon 800 and 20.7 MP camera with the bigger...
Source: http://www.gsmarena.com/alleged_official_documentation_gives_xperia_z1_mini_specs-news-6878.php