flashing/debranding w850i vodafone Australia

Hi I'm new here so i apologise in advance if this has been posted before. I have a sony ericsson w850i locked with vodafone. I wish to debrand it but the problem is i have no idea which firmware to use. Also what would be the best software to use for debranding and installing the firmware? please email info to daomanga@hotmail.com if possible, many thanks in advance

Check Top Sony Forums , you have there video tutorials and guides. I use XS++ and SeTool2 lite. Wish you luck :)