WorldUnlock Codes Calculator is a program to unlock certain mobile phones.
Mobile phone companies sell phones to their clients at a cheaper price than their market value, but those phones can only be used with the SIMs provided by those companies, because they are locked. It is possible to unlock your phone in order to use it with a SIM provided by another company. Keep in mind that this procedure is illegal in some countries.
World UnlockCodes Calculator can give you the code you will need to enter to unlock your mobile phone. This procedure is called "Remote Unlocking". In this version it provides codes for some Alcatel, LG, Maxon, NEC, Nokia, Samsung, Siemens, Sony, Panasonic, and Vitel mobile phone models.
If your phone is on the list, you will have to find out the IMEI (International Mobile Equipment Identity) code. The program will use it to calculate the code you will have to enter in your phone to unlock it. The IMEI code comes printed on the back of your phone, just below the battery. But, in many cases, you can also find it out by entering "*#06# " in your phone.
Having entered the model and the IMEI (and, sometimes, the mobile phone company you were using), the program will generate a code that, once entered in your phone, will unlock it, allowing you to use it with any other company.