How to Fix SIM Card Not Detected after iOS 18/17 Update

Part 1: What's Meaning of No SIM after iOS 18/17 Update?

If you've noticed your phone is sim failure after ios update, don't fret. If your iPhone displays a No SIM Card error after the iOS 18/17 update, you can't connect to your wireless carrier's network. It means you can't use your wireless data over 4G or 5G, and you can't make or receive calls. Somtimes, its difficult to determine the exact cause of these problems. The fact that this might be a bug in iOS 18/17 is one of the reasons we found it.

Part 2: Why Does My iPhone Keep Saying No SIM after iOS 18/17 Update?

The new update for iOS 18/17 may have caused some problems with your device. The update may have affected the SIM card detection on the device, which means the iPhone will not be able to detect the SIM card or find it. 

You may see No SIM or No Service on your iPhone after updating to iOS 18/17, which means your device cannot connect to a mobile network. You cannot also use cellular data or make or receive calls when your iPhone shows No Service or Searching after the iOS 18/17 update. 

Part 3: 1-Click to Fix iPhone Not Detecting SIM Card via UltFone iOS System Repair

UltFone iOS System Repair is the only program to fix iOS 18/17 no sim error. This software is easy-to-use and powerful. It can help you to fix your iPhone 16 not detecting SIM cards on Windows and Mac computers. Using UltFone iOS System Repair, you can quickly fix iOS system issues, iPadOS system issues, and tvOS system issues.

Besides, it also can fix many other iOS system problems like sim not working after ios update, iPhone stuck on Apple logo, frozen screen, boot loop, stuck in recovery mode, and much more. And there's no need for the user to go out for repair service. It just needs one click to download this repair tool, connect your device to the computer and then click Fix All button. 

• Fix 150+ iOS system issues like iPhone 16 no sim card, iOS 18/17 sim failure without data loss.
• 1-Click to enter and exit recovery mode on iPhone/iPad
• Downgrade from iOS 18/17 without iTunes.
• Support all iOS versions and iPhone models, including iPhone 16 series and iOS 18/17.
• Reset iPhone/iPad/iPod Touch without password/iTunes/Finder.

• Step 1 Download and install the UltFone iOS System Repair software on your computer. Connect your iPhone to the computer using a USB cable when prompted.
• Step 2 In UltFone iOS System Repair, click "Start" and select "System Repair" to begin troubleshooting the verification issue.
• Step 3 The tool will detect your iPhone model and download the proper iOS 17 firmware file to help fix the update error.
• Step 4 Once ready, click "Start System Repair." The tool will analyze your iPhone and resolve any iOS problems preventing the update from verifying properly.
• Step 5 The process takes a few minutes. the tool will indicate when it is finished, and iphone no sim after update will be resolved.

Part 4: Other Common Ways for iOS 18/17 Not Detecting My SIM Card

Some users have experienced iOS 17 esim not working or iOS 18/17 sim card not detected. If you're also a victim of this issue and your sim card is not working after the iOS 18/17 update, don't worry. Here are 5 ways you can solve this issue.

Way 2: Restart iPhone

The best way to fix iOS 17 no sim available is to restart your iPhone. To do this, press as well hold the Sleep/Wake button until you see a slide to power off on your screen. Press and hold that button until your iPhone turns off, then turn it back on again. I should help get things going again without any other troubleshooting needed. If, for some reason, it doesn't, continue onto Way 3.

Way 4: Reset All Settings

If the sim card is not detected due to the iOS update, resetting all settings might help. One can do this by going into iPhone Settings > General > Reset All Settings and tapping Erase All Content and Settings. It will wipe out anything that might have caused the problem, but it will also remove any information stored on your phone.

It's also possible that you won't see this setting unless you're using an older device. On newer devices, tap General at the bottom of the list in Settings and then tap Storage & iCloud Usage under Device. There you'll find a button for Reset Storage which does pretty much what it sounds like.

Part 5: Is It Possible to Use My iPhone without a SIM Card?

Using your iPhone without a SIM card may be possible, but there are limitations. It will be impossible for you to make calls  or send texts, and you'll have to rely on Wi-Fi for data. In the same way, an iPod touch can be used without a SIM card; the iPhone can also be used without one.

You can use the iPhone without a SIM card as a Wi-Fi-only device to send iMessages, listen to Apple Music, FaceTime, watch podcasts, and play iOS games you've downloaded. To conclude, there are no limitations to the iPhone with no SIM card other than being unable to make calls and send texts.

Conclusion

You may have noticed that your iPhone won't detect your sim card after upgrading to iOS 18/17. However, there are some methods for you to fix this issue. For example, you can try restarting your phone by pressing the power and home buttons together for ten seconds until the apple icon appears.  We hope that one or more of the 5 ways listed above may help you fix your sim card not detected after the iOS 18/17 update issue. If you find any additional methods, please share them with us in the comments section below or you can try to use UltFone iOS System Repair! We will be happy to update this list and add any new information as it becomes available.