How To Determine Your Mobile PUK Code: 7 Steps (with Pictures)

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How to Find the PUK Code to Unlock Your SIM Download Article An simple guide to entering a PUK code on Android, iPhone, and other mobile phones Author Info

Last Updated: August 2, 2025 Fact Checked

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• Using the PUK Code
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• Obtaining your PUK Code
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• Entering the PUK Code
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• Q&A
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• Tips

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wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. To create this article, 17 people, some anonymous, worked to edit and improve it over time. This article has been fact-checked, ensuring the accuracy of any cited facts and confirming the authority of its sources. This article has been viewed 2,342,619 times. Learn more...

Did you enter the wrong PIN three times when trying to unlock your phone's SIM card? Don't worry—you can still unlock your phone by entering your Personal Unlock Key, or PUK code. If you don't know your PUK code, there are easy ways to get it. This wikiHow article will help you find the PUK code for your phone or tablet's SIM card, and how to enter this 8-digit number to unlock your SIM.

Things You Should Know

• If you can't find the PUK code, don't try to guess it, as you could permanently deactivate your SIM.
• The easiest way to get your PUK code is to request it from your mobile phone provider.
• You may also find the PUK code in your SIM card's packaging, in your mobile provider's official app, or in your account information on the web.

Steps

Part 1 Part 1 of 3:

Using the PUK Code

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1. 1 Know when you need to use it. If you have a PIN on your SIM card as an extra security measure, you'll need to type the PIN in each time you turn on your phone. Otherwise, the PUK code is needed only if you enter the SIM card pin code wrong too many times.
   • A message will appear on your phone saying your PUK is locked. At this point, you will need to enter your PUK code or you won't be able to access the phone.
   • If you also enter the PUK code wrong 3 times, the SIM card will be locked. If you enter the wrong PUK code 10 times or more, then you will need a new SIM card. Some phones call this a PUC code instead, but it’s the same thing. The code is 8 digits long.[1]
2. 2 Understand how the PUK code works. A PUK code (personal unlocking key) is a key that is used to protect your mobile SIM card. Keep in mind that the PUK code is unique to your SIM card.[2]
   • There are a few other reasons why you might want to know your PUK code; the most common is if you're moving from one network service provider to another but want to keep the same mobile number.
   • Working out your PUK code is normally very simple although it can vary depending on who your current provider is. Make sure you write it down somewhere so that you don't forget it once you get it, and also be aware that some service providers limit the length of time the PUK code will be active.
   • A PUK is a second level of security on a SIM card. The PUK code is unique to the SIM inside the phone and not the phone itself. The PUK is kept by the network operator.
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Part 2 Part 2 of 3:

Obtaining your PUK Code

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1. 1 Check the SIM card packaging. If you have recently purchased a SIM card, then look on the packaging. Sometimes the PUK card is printed on it.[3]
   • Look at the box that your SIM card came in, and the PUK code should be there on the box or label.
   • You could also call the retailer you have purchased the phone from if you can’t find this code, and they should be able to assist
2. 2 Call your network provider. The PUK code is unique to your SIM card, so you can only get this from your mobile network. Sometimes the network will give you this when you first get the SIM card, but not all networks do this.[4]
   • If you cannot find it, give your mobile network a call, and customer support will be able to give you the PUK code or generate a new one after you have answered some security questions.
   • The network provider is going to ask you to prove your identity. Sometimes, this entails providing your date of birth and address. You won’t be able to get the PUK code if you can’t prove that you own the phone. You might be asked for the SIM card code from its packaging too.
3. 3 Check online through your network provider. You can try online to find your PUK code as long as you have an online account through your network provider (most offer this service).[5]
   • Log in to your mobile phone account on your computer and look for a PUK code section on your account page. Where this appears will vary among network providers. For AT&T Wireless, you log into the AT&T online account. Select “wireless” from the “myAT&T” tab at the top of the page. Select “phone/device.” Select: “Unblock Sim card.” A new page will open that provides your PUK card.[6]
   • Some prepaid phones also use PUK codes and will provide them to you online if you know the mobile number and the name and date of birth of the account holder.[7] If you don’t already have an online account, it’s usually easy to create one if you have your mobile number and basic information to prove your identity.
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Part 3 Part 3 of 3:

Entering the PUK Code

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1. 1 Enter the PUK code into your mobile phone. Most phones will prompt you to enter the PUK code once you've entered the SIM PIN incorrectly several times. If prompted, enter your PUK code to continue.[8]
   • If you are not prompted to enter a PUK code, open your phone dialer and enter this code: **05*(PUK Code)*(New SIM PIN)*(New SIM PIN) again.
     • Replace "PUK Code" with your PUK code, and "New Sim Pin" with the new SIM PIN you'd like to create.
   • Follow the instructions on the phone to complete the process.
   • Different mobile phones will have different steps, but most will inform you they've locked the phone down and that you need to type in the PUK code.
2. 2 Enter a new pin code. If you’ve had to enter your PUK code because you had the PIN code wrong, once you enter the PUK code, you will need to input a new PIN for the SIM card.[9]
   • After you have done so, your cell phone should be unlocked, and you will be able to use it again.
   • Some phone users must enter **05* before entering the PUK code. Then, enter the 8-digit PUK card and hit enter. Nexus One users should type in the **05*, their PUK number, *, their new PIN, *, their new PIN again, #.
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Community Q&A

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• Question What if I have lost my PUK number? Jody Hodges Community Answer Call your provider. They will ask a security question to continue to provide the PUK. Thanks! We're glad this was helpful. Thank you for your feedback. If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow Yes No Not Helpful 262 Helpful 574
• Question How do I complete the process to enter the PUK code? Michael Bogaerts Community Answer That depends on your phone, on most phones it will ask you to put in the Puk code and press okay. After this, it will ask you for a new pin code twice. If you have filled in a new pin code right twice it will ask you for your phone unlock and you are ready to go. Thanks! We're glad this was helpful. Thank you for your feedback. If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow Yes No Not Helpful 135 Helpful 204
• Question How do I get the code with out knowing the phone number? Michael Bogaerts Community Answer You need the sim card number, the PUK code is not related to your phone number. On the sim card there is a number but you have to call the provider. If it's not your sim card, you will have no luck using it. Thanks! We're glad this was helpful. Thank you for your feedback. If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow Yes No Not Helpful 125 Helpful 202

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Tips

• Just call customer support for your network provider. It's often the quickest way. Thanks Helpful 3 Not Helpful 2

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Warning

• Don’t waste time trying to guess your PUK code. If you enter it wrong 10 times, you will have to get a new one as it will be permanently locked.

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References

1. ↑ https://ccm.net/mobile/2573-how-to-use-a-puk-code-to-unlock-a-sim-card/
2. ↑ https://www.confused.com/mobile-phones/guides/puk-code-how-to-find-it-and-unlock-your-phone
3. ↑ https://www.digitalcitizen.life/get-puk-code-sim-card/
4. ↑ https://www.confused.com/mobile-phones/guides/puk-code-how-to-find-it-and-unlock-your-phone
5. ↑ https://www.att.com/support/article/wireless/KM1011771/
6. ↑ https://www.att.com/support/article/wireless/KM1011771/
7. ↑ https://www.telstra.com.au/small-business/online-support/accounts-payments/unlock-phone-using-puk-code
8. ↑ https://www.t-mobile.com/support/devices/puk-code-unlock
9. ↑ https://www.t-mobile.com/support/devices/puk-code-unlock

About This Article

wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. To create this article, 17 people, some anonymous, worked to edit and improve it over time. This article has been viewed 2,342,619 times. How helpful is this? Co-authors: 17 Updated: August 2, 2025 Views: 2,342,619 Categories: Telephones Article SummaryX

1. Check the SIM card packaging for an 8-digit number. 2. Call the retailer to ask if they can help. 3. Call your carrier's customer service number for assistance. 4. Check for a PUK code section in your online account if you have one. Did this summary help you?YesNo

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Click a star to vote Co-authors: 17 Updated: August 2, 2025 Views: 2,342,619

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