What is the SIM card PIN? Why do so many people suggest turning it on?

Indeed, as the poster said, when Snails are browsing the news, they often see content like this: The police remind the public to set a PIN code for mobile phone cards. So why do the police remind everyone to set a PIN? What is it? Today, Mr. Snail will share it with you.

What is a PIN?

The PIN code is simply the password of the mobile phone card. After setting the PIN code, whether it is shutting down, restarting, or inserting or removing the mobile phone card, you must enter the PIN code before you can use the mobile phone card to make calls or surf the Internet.

Therefore, its purpose is very clear. It can very well prevent others from inserting your mobile phone card into their own mobile phones and using the mobile phone verification code to modify your WeChat and Alipay passwords and steal your personal property. Therefore, in addition to setting a mobile phone password every day, we also need to lock the mobile phone card.

How to set a PIN code?

Android phone gt;gt;

Settings Security and Privacy, find the "Set SIM card lock" option, enter the original password of the PIN code to successfully activate the SIM card lock function. After activation, you can change the password yourself.

(Generally speaking, the original password of the PIN code is 1234 or 0000)

iPhone gt; gt;

Settings Phone, find the "SIM card PIN code" option, enter the original password of the PIN code to successfully activate the SIM card lock function.

What should I do if I enter the wrong PIN?

Remember! There are only three opportunities to enter the PIN code. Once you enter the PIN incorrectly three times, the phone card will be automatically locked.

If you accidentally enter the wrong number three times, you will be prompted to enter the PUK code. Don't act rashly, because there are only 10 opportunities to enter the PUK code. Once you enter the PUK code incorrectly 10 times in a row, the mobile phone card will be reimbursed. After the mobile phone card is locked, you should call the operator as soon as possible and ask for the PUK code to unlock your mobile phone number.

China Mobile: 10086

China Unicom: 10010

China Telecom: 10000

Snail Mobile: 10040

SIM card passwords are divided into four types: PIN code, PIN2 code, PUK code and PUK2 code***. The initial codes of these four passwords are provided by China Mobile, the operator that provides the SIM card. The relationship between the four passwords As follows:

The PIN code (PIN1) is the personal identification password of the SIM card. If not modified by the user, the original password set by the operator is 1234 or 0000.

If the power-on PIN code is enabled, you must enter the 4-digit PIN code every time you turn on the phone. The PIN code can be modified to protect your SIM card from being used by others. It should be noted that if you enter the wrong PIN code three times, the phone will automatically lock the card and prompt you to enter the PUK code to unlock it. At this time, you are close to the edge of danger. Therefore, if you change the PIN code without authorization, you must remember it.

The PUK1 code consists of 8 digits, which cannot be changed by the user. When the phone's PIN code is locked and you are prompted to enter the PUK code, do not act rashly, because you only have 10 opportunities to enter the PUK code. If you enter the PUK code incorrectly 10 times, the SIM card will be permanently locked, that is, it will be scrapped.

The PUK code of some SIM cards is included with the card when the user purchases the card, such as China Mobile's Shenzhouxing, etc., while other parts need to be requested from the network operator. If your PIN code is locked and If you do not know the PUK code, do not enter it casually. The correct approach at this time should be to call the service hotline of the operator of the SIM card. After a simple verification of user information, you can obtain the PUK code and unlock the phone. This item The service is free.

PIN2 code

PIN2 code

Nowadays, mobile phone numbers are bound to too many important information, such as bank cards, Alipay, WeChat and so on. You need to enter the correct PIN code when turning on the PIN code on your phone, turning the phone off and on again, or taking out the card and inserting it into another phone, so that this phone card will have a signal! In case your phone is lost, your phone has a fingerprint or lock screen password, but someone else takes out the card and inserts it into another phone, bypassing your phone fingerprint and lock screen password. At this time, if you enable the PIN code This comes in handy, buying you more time to go to the business hall to replace the card or call your operator’s customer service hotline first to apply for outage insurance! The last and most important point is that the default PIN code of the SIM card is 1234. After turning on the PIN code, you must remember to modify the PIN code. You can set up to 8 digits. Otherwise, there is no difference between the default PIN code of 1234 and whether it is turned on. If you enter the wrong PIN code three times in a row, you will be locked. At this time, you need to enter the PUK code to unlock it. The PUK code can be checked by the operator's customer service. If you enter the wrong PUK code 10 times in a row, the mobile phone card will be permanently locked and scrapped. , then you can only go to the business hall to refill the card! PIN is a protective measure and will always be useful if turned on.

SIM, also known as subscriber identification card, is a data card for digital mobile phones. It records the user's identity and key, which can be used by the GSM system to identify the user's identity and record the user's voice. The information is encrypted. The SIM card effectively prevents theft, paralleling and eavesdropping of voice information.

The PIN code is simply the password of the mobile phone card. After setting the PIN code, whether it is shutting down, restarting, or inserting or removing the mobile phone card, you must enter the PIN code before you can use the mobile phone card to make calls or surf the Internet.

So, why is it recommended that you turn on the PIN? Because someone who picks up your phone or steals your phone can get your phone again, take out the SIM card and put it in another phone, and then use your WeChat, QQ , Alipay, etc. can reset your password for you through your mobile phone number. This action may be completed before you call the operator to report the loss, and it can well prevent others from inserting your mobile phone card into their own mobile phones for use. , use the mobile phone verification code to modify your WeChat and Alipay passwords and steal your personal property.

In fact, you can turn this thing on or off, but if you don’t turn it on, what if your phone is stolen or dropped that day. If the above things happened, wouldn’t it be bad luck? Don't be afraid of anything, just be afraid of ten thousand, don't be afraid of trouble! !

Mobile phones have become standard equipment for people. They use more and more functions and store a lot of personal information. In addition to communications and cameras, mobile payment, transfer, and other mobile banking functions are fully equipped.

In the event that the mobile phone is lost or criminals steal the mobile phone information for online loans, shopping, etc., the user will suffer property losses and face other uncertain risks.

Therefore, the Ministry of Industry and Information Technology of my country and many people suggest turning on the PIN code of the mobile phone SIM card.

Every mobile phone is equipped with a SIM card, and its password is the PIN code. It is a personal identification password provided by the operator for SIM card security.

The PIN code for initial use of a mobile phone is generally 1234. After the user resets it, the phone will automatically prompt to enter the PIN code to unlock it every time it is turned on, so that the user can use it normally.

Then why do many people suggest turning on the PIN code? The main function and purpose of setting a PIN code: When your mobile phone is lost or stolen and the loss is not reported in time, criminals cannot use weak verification methods such as mobile phone numbers to obtain "verification codes" to obtain personal information and user property in the mobile phone.

If the phone is an iOS system: You can click on the cellular network, select the number of the PIN code you want to set, and slide the button to set the password. When setting up, you need to first enter the original default PIN code (1234), and then enter your personal four-digit password to complete.

If the phone is an Android system: you can click Settings, select More Security Settings of Security Options, click Encryption and Credentials.

If you have dual SIM cards on one machine, select SIM 1/SIM 2 and click the Lock SIM button. During initial setup, you need to enter the original default PIN code (1234), and then enter your personal four-digit password to successfully set up.

Even if you forget the PIN code, it is very convenient to unlock the SIM card and change the PIN code. Users can directly call the operator to ask for manual service, and then they can obtain the 8-digit PUK code of the owner's mobile phone. After entering it correctly, they can unlock and reset the PIN code.

If the phone is locked, you will need manual service if you use another phone to call the operator. Verify the relevant information of the phone owner to obtain the PUK code. After entering it correctly, you can unlock and reset the PIN code.

It should be noted that the PUK number must be entered correctly. After 10 mistakes, the SIM card will start a self-destruct program. At that time, you can only bring your ID card to the operator's business hall to change the SIM card.

Once the PIN code is enabled on the SIM card, you don’t have to worry about it being inserted into another phone and used. It also greatly reduces the risk of subsequent information leakage and property loss.

The PIN code is the password to protect the SIM card. If it is turned on, others cannot use your card. But it is a bit troublesome that you have to enter the password every time you turn off the phone and turn it on again. But the advantage of this is that if If you lose your phone, this will buy you time to deal with it. Setting a power-on password on your phone will add an extra layer of protection.

PIN code (PIN1), the full name is Personal Identification Number. It is the personal identification password of the SIM card. The PIN code of the mobile phone is a security measure to protect the SIM card and prevent others from stealing the SIM card. If the power-on PIN code is enabled, a 4-digit PIN code must be entered every time the phone is turned on. When the wrong PIN code is entered three times, the phone will automatically lock the card and prompt you to enter the PUK code to unlock. You need to use the service password to call the operator's customer service hotline. The customer service will inform you of the initial PUK code. After entering the PUK code, the PIN code will be unlocked

In fact, this is easy to understand. Usually when we open the mobile phone, we need to enter the correct mobile phone password to open it; when shopping and paying, we need to enter the correct payment password to successfully complete the payment.

The PIN code of the SIM card is the password that we need to enter to use the SIM card. It is a password set by the three major operators to ensure the security of the SIM card and prevent others from stealing your mobile phone card. What does the PIN code do?

The PIN code is also the personal identification code. After we turn on the PIN code of the SIM card, whether we turn off the phone, restart the phone, or insert or remove the phone card, we need to enter the correct PIN code to function normally. Use this mobile card.

If the PIN code is entered incorrectly, the mobile phone card will be temporarily locked and cannot be used normally. It can effectively prevent others from using their own mobile phone cards to accept SMS verification codes or make phone calls, thereby adversely affecting themselves or causing property damage. How to set a PIN code?

Want to set a PIN code for your mobile phone card? It will be slightly different on Android phones and Apple phones, but the general principle is the same. Let’s talk about how to set it up on Android and Apple phones respectively.

Android phone

Open the phone settings, find the security-related setting options in the settings, and then find the options related to setting SIM card lock or setting PIN code to set it.

Apple mobile phone

For Apple mobile phones, you can find the phone option in the settings, and then find the SIM card PIN code option there. After entering, you can turn on the SIM card PIN code function. What is the original PIN code?

Each mobile phone card has an original PIN code, usually the default is 1234 or 0000. Generally speaking, after setting a PIN code, the phone will prompt you to enter the PIN code when you turn it on.

It is important to note that if you enter the PIN incorrectly three times, the mobile phone card will be automatically locked and unavailable. At this time, we need to enter the PUK code provided by the operator for the card to unlock it. What is the PUK code?

So what is this PUK code? It can be simply understood as the second lock of the SIM card. It generally consists of 8 digits and cannot be modified or set by individuals.

When we enter the PIN incorrectly three times, the mobile phone card will be automatically locked and unavailable. At this time, we need to enter the correct PUK code to unlock the mobile phone card.

It is particularly important to note that if the PUK code is entered incorrectly 10 times, the SIM card will automatically be scrapped and become completely unusable, so do not try to enter the PUK code at will. What should I do if I forget my PIN or PUK code?

If we accidentally forget the PIN code, we can enter the correct PUK code according to the prompts to unlock it. After unlocking, we can use our mobile phone card normally.

If you forget the PUK code, it is recommended not to try to enter the PUK code easily. Instead, you should try to find the correct PUK code before entering it, so as not to cause the mobile phone card to be scrapped. How to retrieve PUK code?

This PUK code can be found on the back of the card holder when applying for the SIM card. If the card holder has been lost, you can also go to the operator's official website to retrieve the PUK code through your own service password, or you can Call the customer service hotline and follow the prompts to retrieve the PUK code.

Alternatively, bring your relevant documents and go to the nearest business hall to find manual service. After the document is verified, the manual customer service will usually tell you the correct PUK code. Why is it recommended to enable PIN code?

After turning on the PIN code of the mobile phone card, if our mobile phone is accidentally lost, the other party will pick up the phone and open the screen and will be prompted to enter the PIN code. If he enters the wrong PIN code three times, the mobile phone card will be locked.

A locked mobile phone card will not be able to make calls or receive text messages unless the correct PUK code is entered to unlock it. In this way, you can protect your privacy and property security to a certain extent.

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The PIN in the SIM card is actually a security measure for the phone and the card. It is similar to your ID card. After turning on the phone, you need to enter the PIN in the SIM card when unlocking. If you forget it, you will have to enter it. It will be very troublesome to unlock the business hall. If you don't open it, you can save the trouble of remembering it. You can decide whether to open it or not.