The blinking white screen .... I think it is cause by the constant opening and closing of the phone. If you take a working w300i and quickly open it slightly and then let it close and do this over and over then open the phone you will see the blinking white screen. I think it is a catch in the programming that gets looped. Either way honestly the w300i is a low end phone. I still love it though since it has all the options i wanted and at a low price. I'm thinking of getting a w580i, an s500i or a T650i. They look really awesome.
w580i
http://www.sonyericsson.com/spg.jsp?cc=gb&lc=en&ver= ... »s500i
http://www.sonyericsson.com/spg.jsp?cc=gb&lc=en&ver= ... »T650i
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