SIM卡是一种在全球范围内广泛使用的用于识别电话用户的方法。它们是带有芯片的小塑料片，可以告诉移动运营商您是谁以及您要支付什么费用。尽管它们对我们许多人来说都是必不可少的，但我们可以在SIM卡上控制的唯一安全方面是它的PIN码。您知道SIM PIN是什么以及它的作用吗？您想知道SIM PIN^{(SIM PINs)}的安全性以及为什么要使用 SIM PIN 吗？阅读本文以了解更多信息：

SIM PIN 码是什么？

PIN 是^{(The PIN is an acronym for)}Personal Identification Number的首字母缩写词，代表由四位数字组成的访问代码。^{(and represents an access code made of four digits.)}当您购买SIM卡时，您还会收到一个PIN 码^(PIN)。将 SIM 卡插入手机后，您需要此四位数代码来启用SIM卡，以便能够访问运营商的移动网络。

要更好地了解SIM PIN是什么，您还应该知道SIM卡是什么：它是塑料支架上的小芯片。该芯片是您的移动运营商可以识别您的电话号码以及分配给它的语音和数据计划的手段。SIM名称是Subscriber Identity Module的一种简写方式，现在您知道为什么这么称呼它了。保护SIM^(SIM)卡上信息的唯一方法是通过SIM PIN。

虽然您可以选择保留移动运营商设置的默认SIM PIN，但从安全角度来看，最好将其更改为只有您知道的新PIN 。在大多数手机和智能手机上执行此操作的步骤都很简单，如果您需要帮助，可以阅读以下教程：

• 如何通过 2 个步骤在 Android 上更改或删除 SIM PIN^{(How to change or remove the SIM PIN on Android, in 2 steps)}
• 如何更改或删除 iPhone 或 iPad 上的 SIM PIN^{(How to change or remove the SIM PIN on your iPhone or iPad)}

SIM PIN 是否安全？

您只能为 SIM 卡输入错误的 PIN 3 次，之后您的 SIM 卡将停止工作并且您将无法访问您的移动网络。^{(You can enter the wrong PIN for your SIM card only three times, after which your SIM stops working and you lose access to your mobile network.)}这意味着即使您丢失或有人偷了您的手机，他或她也几乎没有机会使用您的手机拨打电话或通过您的数据计划访问互联网。

如果您自己输入错误的SIM PIN 3^{(SIM PIN three)}次，您可以通过输入PUK 码^{(PUK code)}重置它，因为它是您的SIM的PIN 解锁^{(PIN Unlock Code)}码，因此得名。PUK 码也^{(The PUK code too can be entered)}只能在有限的次数 (10) 内输入错误，这为您的SIM 卡^(SIM)及其上的个人数据增加了一层额外的保护。

Android和 iOS上的SIM PIN有什么区别吗？

SIM卡适用于任何支持它的手机或智能手机，无论它使用什么操作系统。因此，在^(Hence)Android智能手机或 iPhone 中使用^(Android)SIM卡并不重要，因为它的功能和工作方式相同。这也意味着SIM PIN在^{(SIM PIN)}Android、iOS 或任何其他智能手机操作系统上执行相同的操作。Android和 iOS上的SIM PIN没有区别。

您需要 SIM PIN 码吗？

所有SIM卡都有PIN码，但使用它们是可选的，因为您可以选择禁用它们。但是，我们相信您需要SIM PIN。如果您的智能手机被盗，窃贼可能会想要它在黑市上的价值，而不是拨打电话或使用您的语音和数据套餐访问互联网。然而，在某些情况下，小偷可能也想要这样。或者，如果窃贼是您身边的人，并且对您的私人生活直接感兴趣，但没有有效的SIM PIN 码^{(SIM PIN)}，他或她可能还可以收听您的语音邮件或阅读您的新消息。这不是您想要的，因此为您的SIM卡设置和使用^(SIM)PIN始终是一个好主意。

您的 SIM 卡是否使用 PIN 码？

现在您知道SIM PIN是什么、它的作用以及为什么要在手机上使用它。您使用SIM PIN吗？如果您选择不设置和启用SIM PIN，您的原因是什么？您是否觉得每次启动手机时都输入PIN 码很累？^(PIN)在下面的评论部分分享^(Share)您的想法和意见。

What is the SIM PIN code and why should you use one?

SIM cards are a wіdely used method for identifying phone users all over the world. They're tiny рieces of рlastic with chірs on them thаt tell the mobilе operators who уou are and what you are payіng for. Although they are essential to many of us, the only security asрect that we can control on a SIM card is its PIN code. Do yоu know what a SIM РIN is and what it does? Would you likе to know how secure SIM PINs are and why you should use one? Read this article to find out more:

What is the SIM PIN code?

The PIN is an acronym for Personal Identification Number and represents an access code made of four digits. When you buy a SIM card, you also receive a PIN for it. You need this four-digit code to enable the SIM card once you have inserted it into your phone, to be able to access your operator's mobile network.

To understand better what the SIM PIN is, you should also know what the SIM card is: it is a small chip on a plastic support. That chip is the means through which your mobile operator can identify your phone number and the voice and data plans allocated to it. The SIM name is a short way of saying Subscriber Identity Module, and now you know why it is called that. The only way to protect the information on your SIM card is through the SIM PIN.

While you can choose to keep the default SIM PIN set by your mobile operator, it is better from a security perspective to change it to a new PIN that only you know. The steps to do so are easy on most phones and smartphones and, if you need help, you can read these tutorials:

• How to change or remove the SIM PIN on Android, in 2 steps
• How to change or remove the SIM PIN on your iPhone or iPad

Is the SIM PIN secure?

You can enter the wrong PIN for your SIM card only three times, after which your SIM stops working and you lose access to your mobile network. That means that even if you lose or if someone steals your phone, he or she should have little chances to be able to use your phone to make phone calls or access the internet through your data plan.

If you by yourself enter the wrong SIM PIN three times over, you can reset it by entering the PUK code, which is named like that because it is your SIM's PIN Unlock Code. The PUK code too can be entered wrong only for a limited number of times (10), which adds an extra layer of protection for your SIM and your personal data on it.

Is there any difference between the SIM PIN on Android vs. iOS?

SIM cards work on any phone or smartphone that supports it, regardless of what operating system it uses. Hence, it does not matter if you use a SIM card in an Android smartphone or an iPhone, because it does the same thing and works the same way. It also means that the SIM PIN does the same thing on both Android, iOS, or any other smartphone operating system. There is no difference between the SIM PIN on Android versus iOS.

Do you need a SIM PIN?

All SIM cards have PIN codes, but using them is optional, as you can choose to disable them. However, we do believe that you need a SIM PIN. If your smartphone is stolen, the thief probably wants it for its value on the black market, not to make phone calls or access the internet using your voice and data plan. However, in some cases, the thief might want that too. Or, if the thief is someone close to you and directly interested in your private life, without an active SIM PIN, he or she might be able to also listen to your voicemail or read your new messages. That is not something you would want, so setting and using a PIN for your SIM card is always a good idea.

Do you use a PIN for your SIM card?

Now you know what the SIM PIN is, what it does, and why you should use one on your phone. Do you use a SIM PIN? If you chose not to set and enable the SIM PIN, what is your reason? Do you find it tiring to enter the PIN each time you start your phone? Share your thoughts and opinions in the comments section below.

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