SIM 卡^{(SIM card)}通常需要一个PIN（个人识别码^{(Personal Identification Number)}）来解锁并连接到移动运营商^{(mobile carrier)}，以便您可以拨打电话和使用互联网。SIM PIN^{(SIM PINs)}是一种安全功能^{(security feature)}，可防止未经授权的人在手机被盗或丢失等情况下使用您的SIM 卡。^{(SIM card)}但是，有些人不希望启用此功能，而另一些人则希望更改其移动运营商^{(mobile carrier)}分配的默认PIN并设置自己的。如果您拥有 iPhone 或 iPad，并且想要更改或删除其SIM PIN，请阅读本教程并了解如何：

如何更改iPhone 或 iPad^{(iPhone or iPad)}上的SIM PIN

解锁^(Unlock)您的iPhone 或 iPad^{(iPhone or iPad)}并打开设置^(Settings)。

在设置^(Settings)屏幕上，点击蜂窝网络^(Cellular)。

接下来，点击SIM PIN。

如果您的iPhone 或 iPad^{(iPhone or iPad)}上没有启用它，您现在应该会看到SIM PIN开关处于关闭^(Off)状态。但是，为了能够更改它，必须启用SIM PIN，如果它尚未启用，请点击它以使其启用。^(On)

接下来，点击更改 PIN^{(Change PIN)}。

您的iPhone 或 iPad 会询问^{(iPhone or iPad asks)}您当前的 PIN 码^{(Current PIN)}。输入它并按完成^(Done)。

注意：^(NOTE:)如果您不知道SIM PIN，您应该尝试移动运营商^{(mobile carrier)}使用的默认SIM PIN。如果它不起作用，您应该检查您的SIM 文档^{(SIM documentation)}（如果仍有的话），或联系您的运营商寻求支持。如果您输入了 3 次错误的 PIN 码，SIM 卡将被锁定，^{(If you enter the wrong PIN three times, the SIM card is locked,)}您将无法再在 iPhone/iPad 上拨打电话或使用互联网。

输入^(Enter)您要用于SIM 卡^{(SIM card)}的新PIN。

iOS 要求您再次输入以确认SIM PIN。这样做，然后点击完成^(Done)。

从现在开始，您的iPhone 或 iPad^{(iPhone or iPad)}只有在您输入已设置的新PIN 码^(PIN)时才会在启动时解锁SIM 卡。^{(SIM card)}

如何删除iPhone 或 iPad^{(iPhone or iPad)}上的SIM PIN

完全移除SIM PIN是不可能的。但是，您可以禁用它，这样每次启动iPhone 或 iPad时都不会要求您输入^{(iPhone or iPad)}SIM PIN。为此，请转到Settings -> Cellular -> SIM PIN并禁用SIM PIN开关。

然后，您的iPhone 或 iPad 会要求^{(iPhone or iPad asks)}您输入当前PIN以解锁SIM 卡^(SIM)。完成后，按完成^(Done)。

就这样！从^(From)现在开始，您的iPhone 或 iPad^{(iPhone or iPad)}在您启动时不会要求您输入SIM PIN 。

您在iPhone 或 iPad^{(iPhone or iPad)}上使用SIM PIN吗？

^{(SIM PIN)}如果您想保护您的SIM 卡^(SIM)免受未经授权的访问，SIM PIN可能是一种很好的安全措施。^{(security measure)}但是，只有当您设置的自定义PIN与您的移动运营商设置的^{(mobile carrier)}默认^{(default one)}PIN 不同时，这才是正确的。此外，虽然不推荐，但有些人根本不喜欢启用它。您是否在 iPhone/iPad 上使用自定义SIM PIN ？

How to change or remove the SIM PIN on your iPhone or iPad

SIM cards usuаllу require a PIN (Personаl Identification Number) to unlock and connect to the mobile carriers, so that you can make phone calls and use the internet. SIM PІNs are a security fеatυre that protects unauthorized people from using your SIM card in sіtuatіons such as when your phone is stolen or lost. However, ѕome people do not want this featυre on, while others want to change the default PIN assigned by their mobile сarrier and set their own. If you own an іPhone or an iPad and you want to change or remove the SIM PIN for it, read this tutorial, and find out how:

How to change the SIM PIN on your iPhone or iPad

Unlock your iPhone or iPad and open the Settings.

On the Settings screen, tap Cellular.

Next, tap on SIM PIN.

If it was not enabled on your iPhone or iPad, you should now see that the SIM PIN switch is Off. However, to be able to change it, the SIM PIN must be enabled so, if it is not already On, tap on it to make it so.

Next, tap on Change PIN.

Your iPhone or iPad asks you for the Current PIN. Enter it and press Done.

NOTE: If you do not know the SIM PIN, you should try the default SIM PIN used by your mobile carrier. If it does not work, you should check your SIM documentation if you still have it, or contact your carrier for support. If you enter the wrong PIN three times, the SIM card is locked, and you can no longer make phone calls or use internet on your iPhone/iPad.

Enter the new PIN that you want to use for your SIM card.

iOS asks you to confirm the SIM PIN by entering it a second time. Do so, and tap Done.

From now on, your iPhone or iPad unlocks the SIM card when it boots only if you enter the new PIN that you have set up.

How to remove the SIM PIN on your iPhone or iPad

Completely removing the SIM PIN is impossible. However, you can disable it so that you are not asked to enter the SIM PIN each time you boot your iPhone or iPad. To do so, go to Settings -> Cellular -> SIM PIN and disable the SIM PIN switch.

Then, your iPhone or iPad asks you to enter the current PIN to unlock the SIM. Once you are finished, press Done.

That's all! From now on, your iPhone or iPad does not ask you for the SIM PIN when you start it.

Do you use a SIM PIN on your iPhone or iPad?

SIM PIN can be a good security measure if you want to protect your SIM from unauthorized access. However, that is true only if you set a custom PIN that is different from the default one set by your mobile carrier. Also, although it is not recommended, some people prefer not to have it enabled at all. Do you use a custom SIM PIN on your iPhone/iPad?

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