Siemens S15e :

Siemens S15e :
Monitor Mode:

Code: *#7436267*8378# (*#SIEMENS*TEST#)
Hold red phone button until it code disapears.
Menu 3.3.4 Choose frequency.
Menu 3.3.4.1 Automaticaly.
Menu 3.3.4.2 Choose GSM-900
Menu 3.3.4.3 Choose GSM-1800

Menu 10.1 MS info
Menu 10.2 Soft date
Menu 10.2.1 Software version.
Menu 10.2.2 EEProm version.
Menu 10.3 Tst and product info.
Menu 10.3.1 Handware data.
Menu 10.3.2 Date of manufacture
Menu 10.3.3 Service date
Menu 10.3.4 Date of repair.