Network Unlocking Codes NUC codes, are used to release the network lock on your mobile phone. After entering the NUC code into your mobile phone, you will be able to use SIM cards from other mobile phone network providers in your mobile phone. This is termed unlocking your mobile phone. These codes should not be confused with PAC codes or PUK codes which are used for different purposes. A NUC Code is used to unlock your mobile phone.

Frequently Asked Questions about Network Unlocking Codes:

What is a NUC Code?

NUCs, or network unlocking codes, are used to unlock a mobile phone from its original network (i.e. Vodafone, Orange, T-Mobile, O2, Virgin Mobile, Asda Mobile, Tesco Mobile or 3). When mobile phones are purchased the phone isusually locked to the network whose service you originally signed up to. This prevents SIM cards from other networks being used on the mobile phone. Once a network unlocking code (NUC code) is used on the mobile phone, it is possible to use SIM cards from other networks in that phone, allowing users to change mobile phone network providers at will, for example to get a cheaper deal.

Why should I unlock my mobile phone?

>So you can take advantage of better (cheaper) mobile phone tariffs on other networks.

>So you can use multiple SIM cards with your mobile phone.

>So you can use a local SIM card in another country (reduces expensive roaming fees).

>If selling your mobile phone, it is worth more unlocked.

How do I get my network unlocking code (NUC Code)?

Full instructions for getting your network unlocking code are available here at Click on your current mobile phone provider's name below, then follow the instructions:









What information will I need to retrieve my NUC code?

You will need your mobile phone's IMEI (International Mobile Equipment Identifier) number, need to know the network your phone is currently locked to, the mobile phone make and model and your mobile phone number.

What is an IMEI number?

An IMEI number is the international mobile equipment identifier, a unique 15 digit number that identifies your mobile phone (or other mobile device).

How do I find my mobile phone's IMEI number?

You can retrieve your phone's IMEI (Internation Mobile Equipment Identifier) number by typing the following into your handset:


Your phone's IMEI (serial) number will display.

Alternatively, remove the back cover and battery from your phone and you should see the 15-character IMEI number printed on the phone. .

What does a network unlocking code cost?

This will depend on your network. If your contract has expired, then almost all network providers will supply you with a network unlocking code free of charge. However, if you are still within your contract, the network may charge you a nominal fee (from about 15.00 upwards) for your network unlocking code - this will not terminate your contract. You will need to speak to your network provider as to how you may terminate your contract.

Does using a network unlocking code affect my mobile phone's warranty?

Yes. Your mobile phone's warranty will be void if you unlock your phone.

Is it legal to use a network unlocking code?

Yes. In the United Kingdom, unlocking mobile phones is completely legal.

Can I unlock my iPhone?

Yes. All iPhone's can be unlocked, iPhone 4, iPhone 4S and iPhone 5. The iPhone 5 is compatible with the 4G network.

What is a PAC Code?

PAC codes are required when you want to move network providers and would like to take your telephone number with you. For more information, visit

What is a PUK code?

A PUK code is used if you have locked your phone, for example after entering the PIN number too many times. For more information, please visit

Can I unlock my mobile broadband device?

This is a contentious issue at the moment with the mobile broadband providers. For more information please visit


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