Kumpulan materi pelajaran SMA

Ini adalah Kode rahasia untuk handphone gsm, dan ini bukan rahasia lagi, ini kodenya,
Sony Erricsson
*#06# Display imei
<**< Lock menu
>*<<*<* Service menu

Nokia
*#06# Display imei
*#0000# shows software version
*#746025625# Shows if your phone supports sim lock stopping
*#92702689# display various info, repair date, purchase date, etc
*3370# activate enhanced full rate
#3370# Deactivates enhanced full rate
*4370# activate enhanced half rate
#4370# activate enhanced half rate
*#2820# bluetooth information

Motorola
*#06# Display imei
*#311# OK phone code changed to default code