An unannounced Sony Ericsson was revealed last night when a leaked image of the Xperia X12, codenamed Anzu, was posted on an enthusiast blog. The image shows a device resembling the Sony Ericsson Xperia X10 running a modified build of the Android 2.1 operating system. Little is known about the unreleased smartphone for the time being, though rumors give it a 4.3-inch touchscreen display, an HDMI-out port, HD video recording capability and a very slim candy bar form factor. It is also said that when the device finally does launch some time in the first quarter of 2011, it will be running Android 2.3 (Gingerbread) rather than the already outdated Eclair build seen in the leaked image. Hit the jump for a few more images of the X12.

[Via Eldar Murtazin]