what is solution for C55v18 if is not posibil to read eprom, lang or full flash? write frimware posibil but dead phon! downgrade not posibil! I hawe on non locket phon, upgrade to v18, copy firm posibil, made backup, i flsh locket phon,( only write not posibil read), but phon stil locket, why? someone know?please explain in detail for all.