code *#337# su dung de full reset , cai chinh la no xoa het phan data ,lich lam viec , moi thu ve user het. su dung no o tang thai khong lap Sim.
cac bac oi , may S40 chep full duoc ma , ca flash va eeprom. vi vay dau so no chep giua duong. Ly do , thuong do may cable che^' no chay tum bay do.
bye
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