Unlock Nokia phone

Normally the company that sold you the phone (i.e: AT&T) locked the phone so that you could only use the phone on their network, you could not use the phone on other network even if you changed your sim card, so you may need to unlock your phone if you changed your SIM card or move to another country.
Here are the steps to unlock your Nokia phone:
1) try to get the free unlock code from your service provider, this is the best way if work well.
2) Download one free software to generate the unlocking code, here is one.
3) Get your IMEI number, normally you could type *#06# to get it.
4) Use the software you downloaded, enter the "Nokia" and the IMEI code of your phone, generated the unlock code for you, maybe you could get more than one number, select one.
5) Enter the code in your phone WITHOUT sim card IN.
6) To access "p" just press star key "*" three times within one second. To access "w" press "*" four times within one second.

To access button "+" you have to press twice "*" within less than a second.