How to unlock Txt

[Ck13i]

How I can unlock my sonny ericsson txt (ck13i). I need phone lock code

[Alexander1]

If the phone is locked with a phone lock code you need to have the phone sent to service to get it unlocked. Please contact your local Xperia support team for more information: 

http://www.sonymobile.com/global-en/support/contact-us/

Also you could try with the default code 0000. But if the code have been changed you need to contact a service center. 

[supergal]

If it is network locked,You could purchase such network phone lock code from any vendors online like ClassicUnlocking.com

[Seenu]

You ask your network provider.