help w550i update

Hello everybody i have a sony ericsson w550i phone with WSOD problem.there's no update available in SEUS for my phone.people say i shud flash it,but i know nothing about it.can anyone help me.i googled but unable to find complete info on how to flash.thanks u

use the search button and seek help. there are lots of thread on how to flash w550 or how to flash your phone with xs++