[Q]Switching from Andoid to win 8, or buying a new motherbod worth it?? + extra

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http://androidforums.com – Hello, I'm gonna tell a short story, if you don't want to read it skip right to the questions, thank you!! I'm an android user since 2010, my first device was sony experia X10, afterwards followed SGS2 and now SGS3, which is bricked, EFS folder is missing, and J-TAG didn't help (That's what the tech said). The options I have left with are to buy a new motherboard for SGS3(The tech who tried to fix the phone using J-TAG and failed, advice/told me to buy a new motherboard. I'm a bit skeptical if he can really get a new motherboard and use some other devices motherboard), or buy a new a (General)