What Is a NCK Code?

When a cellular phone is provided or manufactured by a company that also provides cellular service, they generally restrict the phone so that it only works on their own network. Entering an NCK code is a means of removing that restriction on some types of phones. Customers may sometimes obtain the NCK code directly from the phone manufacturer if they have a valid need to unlock the phone, such as traveling to another country. Some NCK codes can also be deduced from an algorithm by using the phone's unique IMEI number.