There are a few things you can do to make sure your Android phone stays as safe as possible should it stray from your hands—a good lock screen password is a solid start. What you may not realize is that there’s a way to take that security a step further by enabling SIM Lock.

您可以采取一些措施来确保您的Android手机从手流失时能保持尽可能的安全- 好的锁屏密码是一个不错的开始 。 您可能没有意识到，有一种方法可以通过启用SIM Lock将安全性进一步提高。

Before we discuss how to enable SIM Lock, let’s first talk about what it isn’t. Judging by the name, it’s easy to assume that this is some sort of setting that will sound an alarm should the installed SIM be removed. That’s not what this is, however. Essentially, SIM lock requires your lock screen PIN, pattern, password, or fingerprint and SIM card to be in place before the phone can be unlocked. You can kind of think of it as physical two-factor authentication, which deters thieves from removing the SIM in order to avoid being tracked.

在讨论如何启用SIM Lock之前，让我们先讨论一下它不是什么。 从名称来看，很容易假设这是一种设置，如果卸下已安装的SIM卡，它将发出警报。 但是，这不是什么。 从本质上讲，SIM卡锁定要求您先锁定屏幕PIN码，图案，密码或指纹以及 SIM卡，然后才能解锁手机。 您可以将其视为物理两因素身份验证，它阻止盗贼删除SIM以避免被跟踪。

Now, a few things you should be aware of before setting up SIM Lock. First off, you’ll need to know your carrier’s default unlock code. For many, this is just 1111, but be aware: if you enter this incorrectly three times, it will render your SIM useless (that’s part of the security of it, after all). You can start by trying 1111, but if that doesn’t work on the first try, you’ll probably need to contact your carrier to get the default code.

现在，在设置SIM Lock之前，您应该了解一些注意事项。 首先，您需要知道运营商的默认解锁代码。 对于许多人来说，这只是1111，但请注意：如果您输入了3次错误，将使您的SIM卡失效(毕竟这是其安全性的一部分) 。 您可以从尝试1111开始，但是如果第一次尝试不起作用，则可能需要联系您的运营商以获取默认代码。

Secondly, and this should really go without saying, but if your carrier doesn’t use SIM card, then SIM Lock won’t work (and probably isn’t even available on your handset). So this article isn’t for you.

其次，这确实不言而喻，但是，如果您的运营商不使用SIM卡，则SIM Lock将无法正常工作(并且手机可能甚至无法使用它)。 因此，本文不适合您。

With that out of the way, let’s get into it.

有了这些，让我们开始吧。

The first thing you’ll need to do is jump into the Settings menu. On most phones, you can do this by pulling down the notification shade and tapping the cog icon.

您需要做的第一件事是跳到“设置”菜单。 在大多数手机上，您可以通过下拉通知栏并点击齿轮图标来做到这一点。

Once in the Settings menu, things can get even trickier—every manufacturer does their own thing in this menu, so there’s no clear way to say “tap this, then this, then this.” So the easiest thing to do will be to use the Search tool, which is generally found in the top right corner. Tap that, then type “SIM Lock.”

进入“设置”菜单后，事情可能会变得更加棘手-每个制造商都在此菜单中做自己的事情，因此没有明确的方式说“先点击然后再点击”。 因此，最简单的方法是使用“搜索”工具，该工具通常位于右上角。 点按该，然后输入“ SIM卡锁定”。

If it’s available on your phone, then “Set up SIM card lock” will show up at the top of the list. If not, well…I’m sorry.

如果您的手机上有此功能，则“设置SIM卡锁”将显示在列表顶部。 如果没有，那么…对不起。

Go ahead and tap that option, which will open the SIM Lock menu, which is super simple—it’s literally two options. When you tap the “Lock SIM card” box, it’ll automatically prompt for the SIM PIN and show how many attempts you have left. Like stated earlier, the default is usually 1111, but if that doesn’t work, you’ll need to contact your carrier to find out what they use.

继续并点击该选项，这将打开“ SIM卡锁定”菜单，该菜单非常简单-实际上是两个选项。 当您点击“锁定SIM卡”框时，它将自动提示您输入SIM卡PIN码，并显示您还有多少次尝试。 如前所述，默认值通常为1111，但是如果该值不起作用，则需要联系运营商以了解其用途。

Once you’ve entered the correct PIN, SIM Lock will be switched on. At this point, you’ll want to tap the second entry in this menu: Change SIM PIN. You’ll enter the current PIN (again, the default), then select one of your own between four and eight digits. Make it hard to guess, but easy to remember (it can be different from your normal lock screen PIN). If you forget, you’ll only have three tries to get it right before your SIM is toast!

输入正确的PIN码后，SIM卡锁将打开。 此时，您需要点击此菜单中的第二个条目：更改SIM PIN。 您将输入当前的PIN码(再次是默认密码)，然后在四到八位数字之间选择一个。 难以猜测，但容易记住(它可能与您的常规锁定屏幕PIN有所不同)。 如果您忘记了，在尝试烘烤SIM卡之前，您只有三种尝试来使它正确！

After you confirm the new PIN, you’re all good. From now on, the phone will require both your current lock screen security entry and the locked SIM to be installed before it’s usable. Solid.

确认新的PIN后，一切都很好。 从现在开始，手机将需要同时使用当前的锁定屏幕安全性条目和已锁定的SIM卡，然后才能使用。 固体。

This is probably one of the least-used security methods available in Android, despite being around for many years at this point. It’s an excellent tool to add an additional layer of protection against would-be wrong-doers should your device get lost or stolen.

尽管目前已经存在很多年了，但这可能是Android中使用最少的安全方法之一。 这是一个出色的工具，可以在设备丢失或被盗时增加额外的保护层，以防止可能发生的过失。

翻译自: https://www.howtogeek.com/259360/how-to-set-up-sim-card-lock-for-a-more-secure-android-phone/