The new Sony Ericsson Teacake: Android or not?

  Here are some screenshots from the new Sony Ericsson Teacake also know as W150i. Teacake is the new stick-phone with touchscreen display from Walkman series. Teacake has design very close to X10 mini. The interface of Teacake is also very similar to X10 mini. But… the platform on the new device is probably not Android. Any suggestions?