SP unlock *#0003*(secret code 8 digits)#

*#06# for checking the IMEI (International Mobile Equipment Identity)

MONITOR MODE

The Siemens S4 series also haves a Monitor mode that can be activated directly from the standard user keypad. In order to activate this mode, you must enter the special access code currently programmed into the phone.

TO ACTIVATE MONITOR MODE

• Menu
• 9 (Phone Options)
• 7 (Phone Status)
• Left Display Button (left MENU key)
• 7684666
• HangUp Button (Red HandSet key)

Now "Monitor" should appear at the bottom of the Network Options menu. Pressing the right Display Button when in monitor mode will show a list of the six cells with the strongest signals. Test Mode Indicators: (* = only available when call in progress )

Unlock Siemens S4

(*For advanced users only)

At addresses 0D8 to 0DD the phones code is stored. To read the code swap nibbles stored at addresses from 0DA to 0DD. Error counter is at 0D9. To clear the Phone Code write at addresses from 0D8 to 0DD: 00, 00, FF, FF, FF, FF.

Pin Out

• GND
• SB
• POWER
• NC
• TX
• RX
• CLOCK
• DATA
• GND MIC
• HF MIC
• AUDIO
• GND AUDIO