What could be Sony Ericsson’s replacement to the XPERIA X8 has apparently leaked, under the codename the Sony Ericsson ST18i “Asuza”, along with another new touchscreen/QWERTY handset, the CK15i. Similar in appearance to the new XPERIA mini, the ST18i is tipped to have a 3.3-inch display and run Android 2.3 Gingerbread; the CK15i is believed to be launching as the Sony Ericsson txt pro, and have a slide-out keyboard like the new XPERIA mini pro.

The ST18i has twin cameras – front and back – with the rear one having an LED flash. Inside is believed to be an unspecified ARM Cortex A8 processor; this probably won’t be a high-end device, but instead positioned in the mid-range for those who want a bigger display than the compact XPERIA mini but not something quite as big as the Arc. As for the CK15i, that looks to have the same 3.3-inch display size – said to be running at 240 x 400.

An official launch for the ST18i could be as early as later in May 2011, though that’s obviously not confirmed at this stage. We’re guessing Sony Ericsson will also include its new Facebook Inside XPERIA system.

[Esato via SEMCblog 1 and 2]