[Q] Cant Repair My Xperia Play, Please Help ME

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http://forum.xda-developers.com – Hi, im srry, i know my english sux... i cant repair my xperia play i triyed with pc companion and flashtool, flashtool send me this error ERR_SEVERITY="MAJOR";ERR_CLASS="SECURITY_CLASS";ER R_DYNAMIC="SIN header verification failed" Please if anyone know how i can restore my device, help me ! Ty So much ! (HowTos)