Gsm Secret Codes (General Scheme + Passwords)

GSM Code Scheme and Passwords
Most of the codes given below follow this pattern. With enough use, you will learn to know what each means:

* * activate
* ** register and activate
* *# check status
* # unregister
* ## unregister and deactivate

Some service providers will also let you change your passwords as follows:

Change Call Barring PIN code: **03*oldPIN*newPIN*newPIN#
Change SIM PIN code: **04*oldPIN*newPIN*newPIN#

If you have never set a PIN before, try the usual default of '0000', '1111', or the last 4 digits of your phone number. If none of these work then contact your service provider. Note that the PIN is not the same as the Call Barring [code] given in the Call Barring section below.


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