Contact your service provider.
NCK means network Code key, which can be used to access the network..
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If your phone does not have a SIM card then it is classified as a Code Division Multiple Access (CDMA) phone. If you have a CDMA phone, then your phone is not unlockable.
PUK (phone unblocking code) can only be obtained via the Cell phone network provider
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If you want to unlock your Nokia 5300 mobile phone from the network lock,you can get network unlock code from Mobileunlocksolutions.com at reasonable price.Here they ask you to specify the country name,current network provider and IMEI number of your mobile phone.
You cannot use a WCDMA phone on a CDMA network. Wideband Code Division Multiple Access (WCDMA), despite its name, is different from and not part of Code Division Multiple Access (CDMA) networks. WCDMA is one type of 3G technology and is an extension of Global System for Mobile Communications (GSM) networks.
To find the network access code on a Samsung Galaxy S5, go to the "Settings" app and tap on "About device." Look for the "Status" option, and then select "SIM card status." Here, you may find information related to your network, including the access code or PIN if it is set. If you're looking for a specific code for network unlocking, you may need to contact your carrier for assistance.
The NP code is the same as the NUC (Network Unlock Code). The phone is locked to the Virgin network and requires a code from them to use another sim from a different operator. You may also find your local market trader or independent phone shop can unlock it for about £10.
You need to look on your wireless router and then check the code and then type that in to your PSP.
If you want to unlock your Sony Ericsson 810i mobile phone from the network lock,you can get network unlock code from Theunlockarena.com at reasonable price.Here theyask you to specify the country name,current network provider and IMEI number of your mobile phone.