Do you know what OS Sony Ericsson XPERIA X1 using? Sony Ericsson does not reveal the OS but the terminal.hu has some screen shoot of it. At the system properties, the XPERIA X1 is running on the newer Windows Mobile 6.1 Preofessional. Aside from the OS, you can see that the XPERIA X1 is powered by a Qualcomm 7200A 528MHz cpu, has a 128MB built in memory and 800 x 480 wide screen. More shots after the jump.

[via Slashphone]