If you have a code means You can enter it using the instructions below and unlock it step by step...You can get the free unlocking instructions and paid unlock code from the site www.mobile-unlocker.com
and unlock your phone....
Warning : Do not enter any wrong unlock codes on your Sony Ericsson Xperia mobile phones. If you enter over a certain amount of wrong unlock codes on your Sony Ericsson Xperia mobile phone, your phone may get hard locked and sometimes become unusable.
1 - Switch ON your Sony Ericsson Xperia without any SIM Card,
2 - Press the left arrow key/button once,
3 - Press the button * twice,
4 - Press the left arrow key/button once,
5 - The message "Personalize with MNC2" will appear, (or you will have displayed an unlock menu, select the lock you want to unlock)
6 - Enter the Unlock Code.