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PUK stands for “Personal Unlock Key”, which means personal unlock code. This is the unique code associated with the phone SIM and is usually 8 characters long. The PUK code is needed when the SIM card is locked and you enter the wrong password more than 3 times. The phone will then be locked and need to enter the PUK code. This code is usually not difficult to find.
Steps
Uses of PUK . code
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When do you need a PUK code? When setting up a PIN for your SIM card as an extra protection, you’ll need to enter your PIN every time you open your phone. In other words, the PUK code is only needed when you enter the wrong SIM card PIN too many times. [1] X Research Source
- The message that the PUK code is locked will appear on the screen. At this point, you need to enter the PUK code to access the phone.
- If you enter the wrong PUK code more than 3 times, the SIM card will be locked. If the PUK code is entered incorrectly more than 10 times or more, this SIM card will no longer be usable. PUC is another name for the PUK code on some phones, but it’s essentially the same and has 8 characters. [2] X Research Sources[3] X Research Sources
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How does PUK code work? The PUK code is the private key used to protect the SIM card. Note that the PUK code of each SIM card is unique.
- There are several other reasons why you should know the PUK code; The most common scenario is when you switch to another mobile network service provider but don’t want to change your phone number.
- Although the carriers are not the same, usually the PUK code is quite easy to get. Make sure you write it down somewhere so you don’t forget, and also be aware that some carriers limit the time the PUK code is available.
- The PUK code is the second layer of security of the SIM card. Not unique to phones, this code is unique to the SIM card inside. The PUK code is held by the network operator.
Find code PUK
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Check the SIM card packaging. If you just bought a SIM card, you can see it on the packaging. Sometimes the PUK code is printed on it.
- Look at the SIM card’s box (if applicable), the PUK code is usually located on the box or product label.
- If you can’t find the PUK code, call the store where you bought the phone, they can help with the problem.
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Call your network operator. The PUK code of each SIM card is unique, so you can only ask for this information from your mobile carrier. Sometimes they will give this information the first time you get your SIM card, but not all carriers do.
- After connecting to the operator and answering the security questions, the customer service staff will read or issue a new PUK code for you. [4] X Research Sources
- Your mobile network service provider will ask you to prove your identity. Sometimes they may ask for the birthday, the address, even the SIM card code on the packaging. They will refuse to provide the PUK code if you cannot prove that you are the owner of the phone. [5] X Research Sources
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Check on your carrier’s online site. You can log in to your account and try to find the PUK code on the mobile network service provider’s website (most overseas carriers have this service). [6] X Research Source
- Log in to your client account on your computer or phone and find the PUK code section on the account page. The location of this option will vary by carrier. In Vietnam, Viettel operator provides My Viettel application (for Android and iOS). After installing and registering/login, click the yellow button with the + sign in the lower right corner of the screen and select “Lookup PIN & PUK”. Enter the capcha code and click the “Lookup PIN & PUK” button, the information you need will appear. [7] X Research Sources
- Some overseas prepaid phones also use PUK codes, which you can look up online if you know the account holder’s phone number and date of birth. [8] X Research Source If you don’t already have an online account, you can easily create one with your phone number and basic information to prove your identity.
Enter code PUK
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Enter the PUK code in the phone. Usually a message asking to enter the PUK code will appear on the screen.
- Follow the instructions on your phone to complete the process.
- Different phone models will have different steps to follow, but most will report that the phone is locked and need to enter the PUK code.
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Enter the new PIN. If you have to use a PUK code because you have entered the wrong PIN several times, after accessing your phone, you will need to enter a new PIN for the SIM card.
- Thus, the phone will be unlocked and can be used normally.
- For some phone models, users need to press **05* before entering the PUK code. Then, enter the next 8 numeric PUK characters and press enter. Nexus One users need to dial **05*, PUK code, *, PIN number, *, new PIN number again and end with #. [9] X Research Source
Advice
- Calling your carrier’s customer service center is still the fastest way.
Warning
- Don’t waste time guessing the PUK code. If you enter incorrectly more than 10 times, the SIM card will be permanently locked.
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wikiHow is a “wiki” site, which means that many of the articles here are written by multiple authors. To create this article, 13 people, some of whom are anonymous, have edited and improved the article over time.
There are 9 references cited in this article that you can view at the bottom of the page.
This article has been viewed 76,172 times.
PUK stands for “Personal Unlock Key”, which means personal unlock code. This is the unique code associated with the phone SIM and is usually 8 characters long. The PUK code is needed when the SIM card is locked and you enter the wrong password more than 3 times. The phone will then be locked and need to enter the PUK code. This code is usually not difficult to find.
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