Some very old Nokia phones can razlochit directly from the keyboard.
To do this:
1. Insert the card of another operator.
2. Turn on your phone and hold the button increases the volume of more than 3 sec., Then release and your phone asks PIN-code.
3. Click the button «C»
4. Then press the button several times * and 04 * PIN * PIN * PIN #
5. Phone writes «PIN changed».
Now turn the phone is switched off. If implemented correctly, it will take a card.
