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May pac cuu gium em cai P910i.em cai may cai ung dung cua P910i ma em cai nham cai thang p900.bay gio may em no treo luon,may pac co cach nao' cai dat goc lai bang phim' tat' giong nhu lenh *#7370# cua nikia ko.em mang on rat nhieu,neu ko co cach nay lam' on chi giup em cach khac cung duoc,lau lau em dung toi sony la bi truc trac ha',thanks may pac nhieu nha,em rat mong duoc su giup do cua moi nguoi!