GSM Network Services Command Strings

Each command is prefixed with either one or two * or # characters as follows:
** Register and Activate
* Activate
## De-Register (and Deactivate)
# Deactivate
*# Check Status
© Call button
Once each command has been entered, if it is a network command (as opposed to a
local handset command) it must be transmitted to the network by pressing the YES
(receiver) key which acts as an enter key - this is represented here with the ©
character. Always enter numbers in full international format
+CountryAreaNumber ( e.g. +447712345678).
Command Description Command String
Security
Change call barring code **03*OldCode*NewCode*NewCode#©
Change call barring code **03*330*OldCode*NewCode*NewCode#©
Change PIN code **04*OldPIN*NewPIN*NewPIN#©
Change PIN2 code **042*OldPIN2*NewPIN2*NewPIN2#©
Unlock PIN code (when PIN is entered wrong 3 times)
**05*PUK*NewPIN*NewPIN#©
Unlock PIN2 code (when PIN2 is entered wrong 3 times)
**052*PUK2*NewPIN2*NewPIN2#©
Display IMEI *#06#