The feature works on GSM network

NOKIA

* # 06 #

show the IMEI code

* # 0000 #

show version of the software

* # 92702689 #

displays information about the mobile phone

* # 746025625 #

stop the SIM Clock

* 3370 #

EFR activate, making the sound more clear, but the lavish battery

3370 # #

deactivate EFR

* 4720 #

enable HR, do not make sound more clear, but sparing the battery

4720 # #

off HR

Eric

* # 06 #

show the IMEI code

> *

show version of the software

SIEMENS

* # 06 #

show the IMEI code

* # 0606 #

show version of the software with instructions

* # 0000 #

and press the green button, reset the me-language automatic language selection

SAMSUNG

* # 9999 #

show version of the software

* # 0837 #

show version of the software with instructions

* # 0001 #

show the serial parameters

* # 9125 #

activate the smiley face when making charging

* # 9998 * 228 or # * # 0228 #

displays battery status [capacity, voltage and temperature]

* # 9998 * 246 #

displays the status of the program