*#06# Xem IMEI.
*#300# OK Xem phien ban phan
mem.
*#301# OK Kiem tra ban phim.
*#303# OK Chuyen sang tieng
Anh.
#304*19980722# OK Bat
engineering mode.
*#304# OK Tat engineering
mode.
*#307# OK Kiem tra
engineering mode.
*#311# OK Doi code mac dinh
cua may.
*#400# OK ADC, Cal, Val (Tui hok
biet cai nay)
*#402# OK Chinh do tuong
phan man hinh.
*#403# OK Thong tin tu nha
san xuat.
19980722 Quan ly mat khau.
*#302 OK Kiem tra Acoustic.