您是否曾见过您的 iPhone 在更换 SIM(switching SIM cards)卡或只是重新启动手机时显示“未安装 SIM 卡(No SIM Card Installed)”、“SIM 卡故障”或“无效 SIM 卡”等消息？所有 iPhone 型号（例如 iPhone 14 或 iPhone X）都可能出现此错误消息，出现这种情况时，您将无法拨打电话、发送短信或使用手机的移动数据(use your phone’s mobile data)。
此错误消息背后有多种原因；如果您看到它，您应该联系您的运营商并确保您有一个有效的计划。只有这样，您才能尝试找出SIM 卡(SIM card)错误的原因并尝试解决它。本文将帮助您修复 iPhone 的“SIM 卡故障”错误，无论您的型号如何。
iPhone 上的
SIM 卡出现故障(SIM Failure)的原因是什么？
服务提供商的无效计划是SIM 卡故障(most common reasons behind the SIM Failure)错误背后最常见的原因之一。人们经常忘记检查他们的计划是否仍然有效。如果没有它，iPhone SIM卡将无法正常工作，并可能会显示此错误。因此，在对SIM 卡故障(SIM Failure)进行故障排除之前，您应始终咨询您的运营商。
如果您确定您有有效的套餐，则问题可能出在SIM卡托盘上。如果SIM卡放置不正确或托盘未完全插入 iPhone，可能会导致SIM 卡故障(SIM Failure)错误。SIM卡损坏是排除SIM 故障(SIM Failure)错误时应考虑的另一个因素。SIM卡的物理损坏可能是导致该问题的原因。
SIM卡问题并不总是导致SIM 故障(SIM Failure)错误的原因。可能是iPhone的系统。由于故障或错误，您的手机操作系统可能无法识别SIM卡。(SIM)有时，您的 iPhone在软件更新后会立即
显示SIM 卡故障消息。(SIM Failure)
无论SIM 卡故障(SIM Failure)背后的原因是什么，都有解决方案。
1. 重新启动你的iPhone
有时，简单的重新启动就可以解决您的 iPhone 可能遇到的各种问题。故障(Glitches)、损坏的临时文件或错误可以通过重新启动设备来解决。它将使 iOS 有机会重置并重新启动。如果由故障引起，
这也可能解决SIM 故障错误。(SIM Failure)
重启 iPhone 的(reboot your iPhone)方法取决于型号。如果它没有电源按钮，您必须同时按下侧面按钮之一和音量调低按钮。然后，按照屏幕上的说明进行操作。
2.打开和关闭(Off)飞行模式(Airplane Mode)
这可能是SIM 卡故障(SIM Failure)最简单的解决方案，iPhone 用户已经很熟悉了。打开和关闭飞行(Airplane)模式有助于解决Wi-Fi、蜂窝数据、蓝牙(Bluetooth)和GPS问题。它还可能修复SIM 卡故障(SIM Failure)错误。使用方法如下：
- 向下滑动(Swipe)以打开菜单并通过单击飞机图标
启用飞行模式。(Airplane Mode)
- 确保在关闭飞机之前让飞机(Airplane)保持开启状态至少 20 秒。这将确保您的手机正确重置连接。如果这没有帮助，请继续阅读。
3. 检查 SIM 卡托盘
如果检查SIM卡托盘，您很快就会注意到SIM卡是否正确插入。要取出SIM卡托盘，您需要弹出工具或回形针。将此工具插入(Insert)SIM托盘旁边的小孔中以将其打开。
SIM卡可能颠倒或(SIM)稍微偏离正确位置。也许SIM卡托盘本身没有完全插入，或者未对齐。取出SIM(SIM)卡托盘之前，请务必关闭 iPhone 电源。
同时，您还应该检查您的SIM卡是否有任何明显的物理损坏。如果是这样，您必须联系您的服务提供商并请求更换。如果卡未损坏，请将其重新插入SIM卡托盘和 iPhone。打开您的设备并查看问题是否仍然存在。
4. 尝试另一张 SIM 卡
如果您检查了SIM托盘和SIM 卡(SIM Card)，没有发现任何错误或损坏，请考虑尝试使用其他SIM卡。也许物理损坏是肉眼看不见的，但其严重程度足以导致SIM Failure错误。
如果新的SIM卡在您重新启动手机时没有导致出现错误消息，则说明您的旧SIM卡有问题。您无需为此测试购买新的SIM卡。(SIM)只需(Simply)向您的朋友或家人借一个即可。
5. 更新运营商设置
如果运营商设置(Carrier Settings)过时，可能会导致SIM卡错误。如果是这种情况，修复SIM 卡(SIM)故障所需要做的就是更新运营商设置。就是这样：
- 转到“设置”(Settings)应用程序，然后转到“常规”(General)选项卡。
- 点击“关于”(About)部分并找到“运营商”(Carrier)选项。
- 如果您的 iPhone 需要更新运营商设置，您会在屏幕上收到一条消息。点击更新(Tap Update)。
您应该重新启动 iPhone 以查看是否解决了SIM 卡(SIM Card)问题。
6. 重置网络设置
有时，iPhone 的网络设置会导致SIM卡出现问题。如果是这种情况，简单的解决方案就是重新启动网络设置。就是这样：
- 打开“设置”(Settings)应用程序并转到“常规”(General)。
- 向下滚动(Scroll)找到“传输”(Transfer)或“重置(Reset)iPhone”选项。
- 当出现新屏幕时，选择重置(Reset)选项。
- 选择重置网络设置(Select Reset Network Settings)并根据提示输入您的安全密码。
7. 升级到最新版本(Latest Version)的iOS
iPhone 面临的大多数问题都是由过时的操作系统引起的。SIM卡故障也不例外。这就是为什么解决方案之一是检查 iOS 更新。如果有可用更新，请安装它并消除问题。要检查 iOS 更新：
- 转到“设置”(Settings)应用程序并选择“常规”(General)选项卡。
- 寻找软件更新。
- (Tap Software Update)如果有可用更新，
请点击“软件更新”来安装它。
如果软件更新(Software Update)可用，某些 iPhone 型号会通知您。前往“设置”并在您的(Settings)Apple ID下查找通知。点击它以选择更新并安装它。
8.联系苹果支持
如果建议的解决方案均无法帮助您修复 iPhone SIM 故障(SIM Failure)错误，您应考虑联系Apple 客户支持(Apple customer support)。
是什么导致了您的案例中的错误，哪种解决方案有效？请在下面的评论部分告诉我们。
How to Fix “SIM Failure” Error on iPhone
Have you ever seen your iPhone display a message such as “No ЅIM Card Installed,” “SIM Failure,” or “Invalid SIM” when switching SIM cards or simply restarting your phone? This error message can happen to all iPhone models, such as iPhone 14 or iPhone X, and when it does, you won’t be able to make calls, send text messages, or use your phone’s mobile data.
There are several reasons behind this error message; if you see it, you should contact your carrier and ensure you have an active plan. Only then can you try to figure out why you are getting a SIM card error and try to resolve it. This article will help you fix your iPhone’s “SIM Failure” error, regardless of your model.
What Causes SIM Failure on iPhones?
An inactive plan with the service provider is one of the most common reasons behind the SIM Failure error. People often forget to check if their plan is still active. Without it, the iPhone SIM card won’t work properly and may display this error. That’s why you should always check with your carrier before troubleshooting the SIM Failure.
If you’re sure you have an active plan, perhaps the problem lies with the SIM card tray. If the SIM card is not placed correctly or the tray is not inserted all the way in your iPhone, it could cause a SIM Failure error. A damaged SIM card is another factor you should consider when troubleshooting the SIM Failure error. Physical damage to the SIM card may be causing the problem.
SIM card issues are not always what causes the SIM Failure error. It may be the iPhone’s system. It could be that your phone’s operating system simply won’t recognize the SIM card due to a glitch or a bug. Sometimes, your iPhone will display a SIM Failure message right after a software update.
No matter the reason behind the SIM Failure, there’s a solution.
1. Restart Your iPhone
Sometimes, a simple restart can fix various problems your iPhone might experience. Glitches, corrupted temporary files, or bugs can be resolved by rebooting your device. It’ll give iOS a chance to reset and start afresh. This also might solve a SIM Failure error if caused by a glitch.
The method to reboot your iPhone will depend on the model. If it doesn’t have a power button, you’ll have to simultaneously press one of the side buttons and the volume down button. Then, follow the on-screen instructions.
2. Toggle the Airplane Mode On and Off
This might be the simplest solution for SIM Failure, and iPhone users are already familiar with it. Toggling the Airplane mode on and off helps with Wi-Fi, cellular data, Bluetooth, and GPS issues. It also might fix the SIM Failure error. Here’s how to use it:
- Swipe down to open the menu and enable Airplane Mode by clicking the airplane icon.
- Ensure you leave the Airplane on for at least 20 seconds before turning it off. This will make sure your phone resets the connection properly. If this doesn’t help, continue reading.
3. Check the SIM Tray
If you check the SIM tray, you’ll quickly notice if the SIM card is inserted properly or not. To take out the SIM tray, you’ll need an ejector tool or a paperclip. Insert this tool in the small hole next to the SIM tray to open it.
The SIM card may be upside down or moved slightly out of the correct position. Maybe the SIM tray itself is not inserted all the way in, or it’s misaligned. Make sure to power off your iPhone before taking the SIM tray out.
While at it, you should also check your SIM card for any visible physical damage. If so, you must contact your service provider and request a replacement. If the card is not damaged, reinsert it in the SIM tray and your iPhone. Turn on your device and see if the problem persists.
4. Try Another SIM Card
If you inspected the SIM tray and the SIM Card and saw no error or damage, consider trying a different SIM card. Perhaps the physical damage is invisible to the naked eye, but it’s serious enough to cause the SIM Failure error.
If a new SIM card doesn’t cause the error message to appear when you reboot your phone, you’ll know that your old SIM card is faulty. You don’t have to buy a new SIM card for this test. Simply borrow one from your friends or a family member.
5. Update Carrier Settings
If Carrier Settings are outdated, they may cause the SIM card error. If this is the case, all you need to do to fix SIM failure is update the carrier settings. Here’s how:
- Go to the Settings app and go to the General tab.
- tap the About section and find the Carrier option.
- You’ll receive a message on the screen if your iPhone needs a carrier settings update. Tap Update.
You should reboot your iPhone to see if this fixed the SIM Card issue.
6. Reset Network Settings
Sometimes, the iPhone’s network settings cause problems with a SIM card. If this is the case, the simple solution is to restart the network settings. Here’s how:
- Open the Settings app and go to General.
- Scroll down to find Transfer or Reset iPhone option.
- When a new screen shows up, select the Reset option.
- Select Reset Network Settings and enter your security passcode if prompted.
7. Upgrade to the Latest Version of iOS
Most of the problems an iPhone faces are caused by the outdated operating system. SIM card failure is not an exception. That’s why one of the solutions is to check for iOS updates. If an update is available, install it and eliminate the problem. To check for iOS updates:
- Go to the Settings app and select the General tab.
- Look for Software Update.
- Tap Software Update if an update is available to install it.
Some iPhone models will notify you if the Software Update is available. Go to Settings and look for the notification under your Apple ID. Tap it to select the update and install it.
8. Contact Apple Support
If none of the proposed solutions helped you fix your iPhone SIM Failure error, you should consider contacting Apple customer support.
What caused the error in your case, and which solution worked? Let us know in the comment section below.
