You will need
- Cell phone, SIM card.
Initially you need to ensure that the operator PINcode is running. To do this, set the parameter phone lock PIN. Open the main menu of your mobile phone, then go to the settings ("Settings" or "Options"). In this section you need to find the item "Settings" and go to it. Here you will see the menu "Set PIN".
Go to this menu and enter a valid pincode. If you don't know, you can watch it on a plastic card, which initially acts as a case for a SIM card. After you enter the code, save the settings. Remove SIM card from cell phone and try to use it on another mobile phone. If when you switch the device requires entering the PINcodeand therefore the previously entered pin is valid. Remove SIM card and insert it into your phone.
Now you need to open the main menu of the cellular phone. Here also go to "security Settings". Further action will be slightly different from the previous one. First you need to disable it on the phone request the PINcode. This can be done in the setup menu pin. After the request codewill be disabled and you will be able to change the PIN. To do this, open the "Change PIN", which will be in menu settings security. Enter the old code, and then assign a new PIN. This way you will be able to change the code. On some phone models, the following steps may slightly differ from the steps described. In General, the procedure for changing the personal codeand the SIM card looks similar on any phone, can only vary the menu name.