iPhone Keeps Restarting Randomly? 8 Fixes [Full Guide]

Why does my iPhone restart randomly? This article provides an answer to this question. You will also find eight easy fixes to resolve the issue. All these fixes are simple, and you can apply them on your iPhone right from your home.

Author Avatar Joy Taylor Last Updated: Nov. 09, 2023

Why does my iPhone randomly restart? Believe me, this is a really frustrating question for those who encounter this issue. If your iPhone keeps turning off and back on by itself, it can disrupt your important activities. That’s not all. It can even lead to your device data loss.

But if you are having this issue, you don’t need to worry. We are here to help you out. In this article, we’ll show you 8 easy fixes for the “iPhone restart randomly” issue. All these methods are simple, and we will also give you a stepwise guide for you. But first, we’ll look into why your iPhone is acting this way. After that, we’ll jump right into the solutions. So, let’s get started!

Tip: You may also like these iOS-related posts.

Why Does My iPhone Restart Randomly

Understanding the reasons behind any iPhone problem can be the first step towards solving it. In our case, multiple reasons cause the iPhone to restart randomly. Here are some of the most common ones.

  • Software Glitch: Sometimes, minor bugs or glitches in the operating system can cause your iPhone to restart. Updating your iOS might resolve this.
  • Battery Issues: A failing battery might not provide enough power. It can also lead your device to shut down and restart. In this case, you need a battery replacement.
  • Overheating: iPhones are designed to shut down as a protective measure when they get too hot. So make sure your phone is kept in a cool environment.
  • Faulty Apps: Some apps may cause the system to crash. Deleting such apps may put an end to the random restarts.
  • Insufficient Storage: A lack of available storage can disturb the iPhone system, and it restarts randomly. So, free up some space for better performance.
  • Hardware Damage: Any form of internal damage, like water exposure, can cause hardware damage. As a result, your iPhone restarts randomly. Consult an expert for a hardware checkup.

Now you know most of the common reasons behind our problem. But knowing this basic knowledge is just the start. So, we’ll now move on to the fixes for this problem.

How to Fix iPhone Randomly Restarts

After scouring the internet and trying practically, we’ve made a list of 8 different methods. Any single one of these methods can help you when your iPhone restarts randomly. Moreover, each method has a step-by-step guide, and we recommend you try them all.

Fix 1. Force Restart Your iPhone

I know your iPhone is restarting randomly. But still, our first method is a force restart. It may sound funny, but a force restart can really solve your issue in most cases. It refreshes your system and resolves minor software glitches that might be causing the problem. Moreover, this method is quick and simple without any data loss.

So, force restart is an ideal first step in solving any iPhone issue. Here is a stepwise guide to force restart your iPhone depending on its model.

For iPhone 8 or Later models:

  1. Press the volume up button & release it quickly. Then press the volume down button & release it quickly.
  2. Now, hold the side button located on the right edge of the device.
  3. Keep holding until the Apple logo appears.
  4. Release the side button at this point.
Restart Your iPhone

Restart Your iPhone

For iPhone 7 or 7 Plus:

  1. Simultaneously, hold the volume down and the Sleep/Wake buttons.
  2. Continue holding them until you see the Apple logo.
  3. Release both buttons when you see the Apple logo.

For iPhone 6s or earlier models:

  1. Hold down both the Sleep/Wake button & the Home button.
  2. Continue holding these buttons until the Apple logo shows up.
  3. Release them now.

Your phone will take a moment to complete the restart process. After your device has restarted, use it as you normally would and see if the issue persists. If this doesn’t resolve your problem, don’t worry. We have more methods to try.

Fix 2. Reinsert Your SIM Card

Our next method is reinserting your SIM card. Sometimes, connection issues can cause your iPhone to restart. Removing and reinserting the SIM card can refresh the phone’s connection to the cellular network. Ultimately, it may solve the problem. Here’s how you reinsert your SIM card.

Step 1. Insert a SIM card ejector tool into the hole next to the SIM tray.

Step 2. Remove the SIM card, clean it carefully, and put it back in the SIM tray.

Removing the SIM card

Remove the SIM card

Step 3. Now, push the tray back into the phone.

By following these steps, you’ll refresh your phone’s cellular connection.

But what if this doesn’t work? Then, there might be some system issue on your iPhone. Let’s see what we can do about it.

Fix 3. Fix the iOS System [No Data Loss] 

If your iPhone keeps restarting, the issue might be rooted in your iOS software. In such cases, you can use a specialized tool to fix the problem. We recommend AnyFix – iOS System Recovery for this purpose. AnyFix is a powerful tool for fixing all sorts of iOS-related issues, including iPhone randomly restarts, black/white/blue screen, stuck on Apple logo, touch screen not working, etc. Moreover, the repair process is not difficult at all. You just require a few clicks to resolve common problems. You can also learn more about AnyFix below.

Free Download

Free Download

* 100% Clean & Safe

Free Download * 100% Clean & Safe

  • Cover 130+ iOS issues – Fix almost all iOS issues, such as frozen screen, battery drain, boot loop, iPhone screen glitching, etc.
  • Provide 3 modes – Use the Standard Mode to repair the system without data loss; or use the Advanced/Ultimate Mode to deeply detect and troubleshoot system issues.
  • Easy operation, quick repair – Just click the buttons to fix the system in 3 minutes. No need to seek help from technicians anymore.
  • Not just iOS – AnyFix can also help you fix 200+ iTunes problems, like iTunes won’t recognize iPhone, iPad disabled cannot connect to iTunes, etc.

Now, AnyFix supports all iPhone models and iOS versions, including iPhone 15 and iOS 17. And it also works well on Windows and Mac.

So, are you ready to fix your iPhone with AnyFix? Free download AnyFix on your computer and here’s a stepwise guide to fix iPhone randomly restarts via this tool.

Step 1. Launch AnyFix and select System Repair from the opening interface.

Tap on System Repair

Tap on System Repair

Step 2. Use a USB cable and connect your iPhone to the computer. Select 50+ iPhone Problems and click on Start Now.

Select iPhone Problems

Select iPhone Problems

Step 3. Three repair modes will appear on the screen. You can go with Standard Repair first.

Choose Standard Repair Mode

Choose Standard Repair Mode

Step 4. Now, you need to download firmware for your iPhone. AnyFix will recommend an appropriate firmware package for this repair process. Click on the Download button.

Click Download to Add a Firmware

Click Download to Add a Firmware

Step 5. When the download is complete, click on the Fix Now button to start the repair process. Keep your device connected during this process.

Firmware Download Completed

Firmware Download Completed

Step 6. When the repair is done, you’ll see a Repair Completed message. Your device will restart now.

Repair Completed

Repair Completed

Tada!!! Now, you should be able to resolve the random restart issue on your iPhone.

Fix 4. Free up iPhone Storage

Running out of storage can cause various issues, like random restarts. When your device is low on space, it struggles to carry out basic functions. Then, the result is our current unstable behavior of the iPhone. Also, freeing up storage is a simple solution that you can try with ease. Here’s how you free up space on an iPhone.

Step 1. Go to Settings > General > iPhone Storage. Now scroll down and see what’s taking up the most space.

Select iPhone Storage

Select iPhone Storage

Step 2. Go back and delete the data of most heavy apps as well as your unwanted photos & videos.

Step 3. In the same iPhone Settings, you can enable the “Offload Unused Apps” feature. This feature will automatically remove apps you don’t use but keep their data.

Step 4. Go to Settings > Safari > Clear History and Website Data. Now clear the Safari data from here.

Step 5. Go to Messages and delete old conversations and media. You can also enable the setting to delete old messages automatically.

By following these steps, you should be able to free up some much-needed space on your iPhone. Possibly, this process will also resolve the issue of random restarts.

Fix 5. Remove Faulty Apps

Sometimes, a poorly designed app can be the reason your iPhone keeps restarting. If you’ve recently downloaded an app and noticed that the issues started around the same time, it might be worth investigating. Apps that crash often or use up too much memory can make your phone act up. But the solution for this is quite simple. You can just remove these faulty apps and resolve your problem. Follow this stepwise guide to remove faulty apps from your iPhone.

Step 1. Take note of when the restarts happen and find the faulty app.

Step 2. To delete the app, press and hold its icon in the App Library.

Step 3. Now choose “Delete App” and then click on “Delete” again.

Click Delete App Option

Click Delete App Option

Keep an eye on your iPhone’s behavior. If it’s no longer restarting, the app is likely the issue.

Fix 6. Update All Apps

Outdated apps might not be fully compatible with the latest iOS. So they cause glitches like random restarts. Most updates also include bug fixes that could resolve the issues you’re facing. Moreover, keeping your apps up-to-date is a simple yet effective way to ensure that your phone functions properly. Here is a step-by-step guide to updating all apps on your iPhone.

Step 1. Go to your home screen and tap on the App Store icon to open it.

Step 2. Once in the App Store, tap on your profile icon and find the “Updates” section.

Step 3. You can either tap “Update” next to individual apps or choose “Update All” at the top of the list.

Updating Apps in iPhone

Updating Apps in iPhone

Stay in the App Store until all updates are finished. This could take a few minutes, depending on your internet & the size of the updates.

If your iPhone randomly restarts even after this, then try updating the iOS version.

Fix 7. Update System Software

iOS software updates are more than just about getting new features. They’re also about fixing problems that users have reported or that the company has identified. Moreover, outdated software can conflict with the latest apps or internal processes. To minimize such risks, it’s a good idea to update your iOS to the latest version available regularly. Below, we guide you through this process step-by-step.

Step 1. Go to Settings > General > Software Update options. If an update is available, you’ll see it here.

Step 2. Click on the update you want and then tap on “Download and Install.”

Update iOS on Your iPhone

Update iOS on Your iPhone

Step 3. After the download is complete, you’ll be prompted to install the update. Your iPhone will restart during this process.

If it does not solve the problem, then why does my iPhone restart randomly again? But no matter the reason, we have a foolproof solution for you.

Fix 8. Factory Reset Your iPhone

As a last resort, you can just restore your iPhone to its factory settings. This erases all data and settings. Then it makes your phone brand new software-wise. And I bet your iPhone was not restarting when you got it new, right? But remember, this process will also wipe your apps, photos, and other data. So, make sure to back up anything important before proceeding. Follow this step-by-step guide to reset your iPhone.

Step 1. Go to the Settings app on your iPhone. Now scroll down and tap on General > Transfer or Reset iPhone.

Tap Transfer or Reset iPhone

Tap Transfer or Reset iPhone

Step 2. Choose “Erase All Content and Settings.” First, enter your device password and confirm that you want to erase everything by hitting the “Continue” button.

You may also need to enter your Apple ID password.

Step 3. Wait while your iPhone resets. This may take a few minutes.

Once the phone restarts, you’ll see the “Hello” screen. You can now set up your iPhone like a new device. You can now use your device without any “iPhone randomly restarts” problem.

The Bottom Line

When the iPhone randomly restarts, you just want to throw it into the wall. But I know you can’t! So, why does my iPhone randomly restart? In this article, we’ve uncovered the mystery! We’ve discussed common reasons for this issue and how to address them. But most solutions may not work when there is a deeper system issue at hand. But in this case, consider using AnyFix for free. It’s a one-stop solution for all iOS-related issues.

Free Download

Free Download

* 100% Clean & Safe

Free Download * 100% Clean & Safe

Author Avatar
Joy Taylor Twitter Share Facebook Share

Senior writer of the iMobie team as well as an Apple fan, love to help more users solve various types of iOS & Android-related issues.

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