how to unlock 810i

can any one show a step by step guide or help to unlock se w810i.
which usb cable i need to unlock, i got the one which comes with the fone , which is this one below

http://images.channeladvisor.com/Sel...e%20DCU-65.jpg


can any one tell me what software tool is needed thank you

you can use the cable that came with the phone
Read here : Flash your phone and How to apply or remove patch using SETool 2 Lite - Top Sony Forums
and here : Remove SIM-lock patch generator - Top Sony Forums