Siemens S4/S4 Power

Secret Codes

*#06# Show IMEI

MONITOR MODE

The Siemens S4 series also have 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 )

Software

I have been asked a lot about how to update the software in Siemens phones. The easiest thing to do is to go to the nearest Philips dealer and make him do it for you. Just remember that it is supposed to be free (a receipt is needed) so don't let him tell you anything else!

Service Provider Lock

The Service provider (SP) lock is used to lock the cell phone to the SP's SIM card. Once the cell phone is locked to a specific operator, if one inserts a SIM card from a different operator the phone will refuse to accept it! The cell phone will however accept another SIM card from the same operator.