The PUK stands for Personal Unlocking Key. It is a security feature for all the modern SIM cards used in smartphones, tablets, and other devices. PUK is a unique code linked to your SIM card. Sometimes it is also known as PUC (Personal Unlocking Code). It is generally 8 digits long. Today we are going to take a deeper look at the PUK code and its related terms. So, if you are wondering what it is and what you should know about PUK codes, this article might help you.
When Do You Need To Use PUK Code?
If you have set a PIN (Personal Identification Number) on your SIM card for extra security, you’ll need to type the PIN every time you turn on your phone. If you enter the wrong PIN several times (usually three times), the SIM card gets blocked. Then you will need to enter the PUK code to unblock the card.
PUK code is also needed if you are moving from one network service provider to another, but want to keep the same mobile number. This process is also known as mobile number porting.
A message will appear on your phone saying your PUK is locked when you enter the wrong PIN more than thrice. At this point, without entering the PUK code, you won’t be able to access the phone.
In case you enter the PUK code wrong 3 times too, the SIM card will be locked. Moreover, if you enter the PUK code wrong 10 times then your SIM card will be blocked permanently, and you’ll no longer be able to use it. Then you’ll be left with no other option than to replace your SIM card with a new one.
How does the PUK Code Work?
It is important to note that the PUK code is unique to every SIM card. Obtaining your PUK code is normally very simple. Although, it can differ depending on your current service provider. When you find out your PUK code, make sure you jot it down somewhere so that you don’t lose it once you get it. Also, beware that some service providers have a limited time validity for the PUK code to remain active.
After entering the PUK code, the service provider will ask you to enter a new PIN. It is recommended to choose a PIN code other than the default PIN provided by the service provider. PUK is second-level security on a SIM card after PIN. The PUK code is unique to the SIM card and not the device it is used in. You can change the PIN code, but not the PUK code.
How to obtain your PUK Code?
There are several ways to find out your PUK code given below:
- SIM Card Packaging: Sometimes the PUK code is printed on the box or label in which the SIM card is packed. You can also find the PUK code on the little card from which you snapped out your SIM card. If you can’t find the PUK on the back of that little card then find a scratch-able area on the back of the plastic card. You can call the retailer you have bought the SIM card from if you are still unable to find this code, and he should be able to assist.
- Call Your Network Service Provider: If you can’t find it, call your mobile network customer support executive. He can give you the PUK code or generate a new one after you answer some security questions. The network provider will ask you to prove your identity by asking questions about your full name, date of birth, address, etc. If you fail to prove that you own the SIM card, you won’t be able to get the PUK code.
- Check Online Through Your Service Provider: Most telecom companies offer online accounts to their customers. If you have an online account with your network provider, you can also try to find your PUK code online. All you have to do is to log in to your mobile phone account on your computer and look for a PUK code section on your user account page. This page varies among different network providers. If you don’t have an account, then create one. It is usually a very easy process if you have your mobile number and basic information to prove your identity.
How to Use the PUK Code?
Usually, you will see a notification popped up on your phone to prompt you to enter your PUK code. Follow the instructions shown on your phone to complete the process. Different mobile phones have different steps to complete the process.
If you are required to enter the PUK code because you had entered the wrong PIN several times then once you enter the right PUK code, you will need to enter a new PIN for your SIM card. After this, your phone will be unlocked, and you can use it again.
Summary
PUK is a string of 8 irregular numbers. Sometimes the PUK code comes along with the SIM card. You can’t modify or reset the PUK code. It changes only when the SIM card is replaced. PUK is used to unlock the phone when the PIN is wrongly entered three times. If the wrong PUK is entered ten times in a row, the SIM card gets locked permanently. Then the user will have to carry all the valid documents to the service provider to get a new SIM card.
So, it is recommended to contact the telecom operator for professional assistance in time when the SIM card is locked due to entering incorrect PIN codes several times. In that case, only a simple verification of user data will be required to obtain a new PIN or PUK to unlock the SIM card.