I tried to flash my sony ericsson w550i main firmware using xs 3.1 but it started and showed in red line saying headers not found.i disconnected the phone and xs warned saying it may damage my phone but I continued and removed it.so did my phone get damaged?my main firmware I downloaded is in .rar format.i've read that it should be in .mbn format.how should I convert it into .mbn format? Help please