*3370# (efr0) : kich hoat
che do EFR, cho chat luong
am thanh tot hon nhung
ton pin hon.
#3370# (efr0) : tat che do
EFR neu da bat, may se khoi dong lai.
*4720# (hrc0) : kich hoat
che do HRC, chat luong am
thanh kem nhung it ton
pin hon.
#4720# (hrc0) : tat HRC neu co dung, khoi dong lai
may.
*#0000# : thong tin phan
mem (phien ban, NSX, ten
phan mem).
*#7760 (srn0) : xem so seri.
*#06# : xem IMEI.
*#92702689# (war0anty) :
cac thong tin bao hanh.
*#746025625# (sim0clock) :
kiem tra sim xem co che do tiet kiem pin hay
khong.
*#7780# (rst0) : khoi dong
lai may (can nhap mat
khau).
*#7370# :khoi phuc cai dat goc (can nhap mat khau).
*#7370925538#
(res0wallet) : luu tru bi
mat wallet (phai biet mat
ma may).
*#67705646# (opr0logo) : xoa logo mang, du ve mac
dinh la ten mang cung cap
dich vu.
*#7220# (pca0) : kich hoat
che do PCCH tiet kiem thoi
gian truy cap gprs (tuy vao mang cung cap dich
vu).
*#7230# (pcd0) : tat PCCH,
may tu khoi dong lai.
*#2640# : hien thi ma bi
mat dang su dung. *#2820# : hien thi
bluetooth.
*#7489# : hien thi man
hinh bao ve.
*#3925538# : xoa bo chi
tieu. x# : xem so thue bao vi
tri x trong the sim (x tu
1-255).
#pw+1234567890+1# hoac
+2#, +3#, +4#, +5#, +6#,
+7# : kiem tra co khoa hay khong.
#pw+xxxxxxxxxxxxxxx+1#
hoac +2#, +3#, +4#, +5#,
+6#, +7# : mo khoa ma
symbian.
>>Format may symbian s60: Tat nguon roi an giu dong
thoi cac phim *, 3, goi di
va nut tat mo nguon. Cac
giu lieu luu tru trong bo
nho dien thoai se bi xoa.
(Ma bao ve mac dinh cua Nokia: 12345).