Apparently, there are only two ways to unlock it: Phoning the company after having been with them more than one year or paying any enterprise to unlock it.
Now, thanks to NokiaFREE Unlock Codes Calculator you'll be able to unlock your mobile phone and use it with any SIM card. You'll see a long list of unlockable models, including Nokia, Samsung, Siemens, Maxon, NEC, Sony, Panasonic, Vitel, AEG / Telital or Alcatel, although we'll also miss some models.
You'll need Internet connection to use the program. Enter the model, country and IMEI and the program will search for the unlock code in the Internet and will show it on screen.
The program is considered to be Adware because it features a banner in the low part of the screen.