nahanap ko kay gugel
direct link : https://www.o2.cz/_pub/42/d2/40/457840_1119067_B315s_22_UPDATE_21._313._03._00._445.BIN
master bakit ganun ayaw kainin ng 936 ko ung binigay mo sakin firmware at current firmware ko ung 983 tapos papalitan ko sana ng 445 ano nanaman kaya prob pa help master salamat...