iPhone Keeps Restarting? 10 Effective Ways to Fix It

If your iPhone keeps restarting, it may be stuck in a continuous restart loop or restart randomly during normal use. Common causes include iOS glitches, faulty apps, update errors, low storage, battery problems, or hardware damage. In this post, you'll learn the common causes of the iPhone restarting issue and the solutions to fix it.

Why Does My iPhone Keep Restarting

If your iPhone keeps restarting, the cause may come from iOS, apps, storage, battery health, or hardware. Here are the most common reasons:

• 01 iOS Update Problems: An interrupted iOS update can cause system errors and make your iPhone restart repeatedly.
• 02 Buggy or Incompatible Apps: An installed or outdated app may crash in the background and trigger restarts.
• 03 Low Storage Space: When your iPhone has very little free storage, iOS may struggle to run normally.
• 04 Battery Problems: An aging or damaged battery may fail to provide stable power, causing the iPhone to shut down and restart unexpectedly.
• 05 iOS System Glitches: Corrupted system files or temporary iOS errors can lead to a restart loop or random restarting.
• 06 Hardware Damage: Drops, liquid exposure, or damaged components can also cause an iPhone to keep restarting.

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10 Ways to Fix iPhone Keeps Restarting

The best fix depends on how your iPhone restarts. If your iPhone still works but restarts randomly, start by checking apps, storage, battery health, and iOS updates. If it is stuck in a restart loop, try a force restart first, then move to iOS system repair or Recovery Mode.

Before trying any repair that may erase data, back up your iPhone if you can still access it.

Fix 1: Force Restart Your iPhone

A force restart is the quickest solution when your iPhone keeps restarting, freezes on the Apple logo, or becomes unresponsive. It refreshes the device without deleting your apps, photos, or other personal data.

For iPhone 8 and later, including iPhone SE (2nd generation and later):

• Step 1. Press and quickly release the Volume Up button.
• Step 2. Press and quickly release the Volume Down button.
• Step 3. Press and hold the Side button until the Apple logo appears.

For iPhone 7 and iPhone 7 Plus:

Press and hold the Side button and Volume Down button at the same time until the Apple logo appears.

For iPhone 6s, iPhone SE (1st generation), and earlier models:

Press and hold the Home button and Side/Top button until the Apple logo appears.

If the iPhone starts normally afterward, continue using it and watch whether the restarting problem returns.

Fix 2: Update or Remove Problematic Apps

If your iPhone works normally for a while and then suddenly restarts, an outdated or buggy app may be contributing to the problem. This is especially worth checking if the issue started shortly after installing or updating an app.

First, update your apps:

• Step 1. Open the App Store.
• Step 2. Tap your profile picture or account button.
• Step 3. Tap App Updates.
• Step 4. Select Update All, or update the apps you frequently use.

If the restarting began after installing a particular app, temporarily delete that app and use your iPhone for a while to see whether the problem stops.

Fix 3: Free Up iPhone Storage

Very low available storage can affect iOS performance and make the device less stable. If your iPhone is almost full, removing unnecessary files and apps is a useful troubleshooting step.

• Step 1. Go to Settings > General > iPhone Storage.
• Step 2. Check how much storage is available.
• Step 3. Review Apple's storage recommendations and the apps using the most space.
• Step 4. Delete unnecessary videos, downloads, or apps, or use Offload App to remove an app while keeping its documents and data.

After freeing some space, restart your iPhone and see whether it continues restarting.

Fix 4: Check Your iPhone Battery Health

A worn or damaged battery may fail to provide enough peak power, which can cause unexpected shutdowns and restarts. This method is especially useful when your iPhone restarts randomly, shuts down at a certain battery percentage, or has been used for several years.

For iPhone 15 and later:

Go to Settings > Battery > Battery Health.

For iPhone 14 and earlier:

Go to Settings > Battery > Battery Health & Charging.

Check the battery health information shown on the screen. If you see a Service recommendation or a message indicating significantly degraded battery health, battery replacement may be more appropriate than software troubleshooting.

Fix 5: Update iOS

If the restarting problem is caused by an iOS bug or an incomplete previous update, installing the latest available version can resolve the underlying software issue.

• Step 1. Connect your iPhone to Wi-Fi and power.
• Step 2. Open Settings > General > Software Update.
• Step 3. If an update is available, tap Update Now button.
• Step 4. keep your iPhone connected to power until the update finishes.

Updating iOS normally keeps your existing data and settings.

Fix 6: Reset All Settings

Incorrect or corrupted system settings can occasionally contribute to repeated crashes or restarts. Reset All Settings returns system settings to their defaults without deleting your photos, messages, apps, or other personal media.

• Step 1. Go to Settings > General.
• Step 2. Tap Transfer or Reset iPhone.
• Step 3. Tap Reset, and select Reset All Settings.
• Step 4. Enter your passcode and confirm.

This resets settings including network, privacy, location, keyboard, and Apple Pay settings, so you may need to configure some preferences again afterward.

Fix 7: Fix iPhone Keeps Restarting with TunesKit iOS System Recovery

No matter your iPhone is stuck on restart screen or restarting intermittently, you can adopt a powerful third-party iOS repair tool named TunesKit iOS System Recovery to fix it efficiently. This professional program can repair more than 150 types of iOS system problems like iPhone frozen, won't turn on, stuck on the recovery mode, iPhone keeps crashing, etc. And the most important part of TunesKit iOS System Recovery is that it can repair all common iOS issues with no data loss.

Besides, it is not only a iOS repair utility, it can also allow users to put iOS device into the recovery mode in one click automatically, bypass some iTunes errors, downgrade iOS system to the previous lower version, etc. The program is available for both Windows and Mac systems and compatible with almost all iPhone, iPad and iPod touch.

Now take your time and follow the step-by-step guide below to fix your iPhone keeps restarting problem with TunesKit iOS System Recovery.

Step 1. Connect Your iPhone

Install and launch TunesKit iOS System Recovery on your computer. Connect the restarting iPhone with a USB cable. Choose iOS System Repair on the main interface and click Start.

Step 2. Choose Standard Repair

Select Standard Repair first. This mode is intended for common iOS system problems and repairs the system without erasing your personal data.

Step 3. Download the Firmware

Check that the detected iPhone model and firmware information are correct, then click Download. TunesKit will download and verify the firmware package required for the repair.

Step 4. Fix the iPhone Restarting Problem

After the firmware is ready, click Start Standard Repair or Repair, depending on the interface shown. Keep the iPhone connected to the computer until the process finishes. When the repair is complete, the iPhone will restart. Check whether it can now boot and operate normally.

Fix 8: Reinstall iOS in Recovery Mode

If your iPhone is stuck in a restart loop and cannot stay on long enough to update normally, Recovery Mode allows a Mac or PC to reinstall iOS.

Apple currently recommends trying Update before Restore because Update reinstalls iOS while attempting to keep your personal data.

• Step 1. Connect your iPhone to a computer with a USB cable.
• Step 2. Open Finder on a modern Mac, Apple Devices on a Windows PC, or iTunes on older supported systems.
• Step 3. Put your iPhone into Recovery Mode.
• Step 4. When your computer displays Update or Restore, choose Update first. The computer will reinstall iOS without intentionally erasing your data.

Fix 9: Restore Your iPhone

If updating through Recovery Mode still does not fix the restart loop, a full restore can remove deeper software corruption.

Unlike the previous methods, Restore erases the iPhone and reinstalls iOS, so use it after trying non-destructive fixes and make sure you have a backup whenever possible.

• Step 1. Connect the iPhone to your computer and enter Recovery Mode again.
• Step 2. Open Finder, Apple Devices, or iTunes.
• Step 3. When prompted to choose between Update and Restore, select Restore.
• Step 4. Wait for iOS to reinstall.
• Step 5. After the restore completes, set up the iPhone and restore your data from an available iCloud or computer backup.

Fix 10: Contact Apple for Hardware Repair

If your iPhone keeps restarting after a full iOS restore, the problem may be hardware-related rather than software-related. Hardware service is particularly worth considering if:

• The iPhone began restarting after being dropped or exposed to liquid.
• Battery Health recommends service.
• The device becomes unusually hot.
• The iPhone repeatedly shuts down even after iOS has been reinstalled.
• The device cannot complete a system restore.

Contact Apple Support or visit an Apple Store or Apple Authorized Service Provider for diagnostics and repair.

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Conclusion

These are the steps that you take in case your iPhone keeps restarting or restarting intermittently. iPhones are designed to last and most software and hardware issues can be rectified with the right skills. TunesKit iOS System Recovery is highly recommended here to fix your iPhone restarting problem. Even when you cannot resolve the restart issue at home, taking it to a professional will help most of the time. Just ensure that you take your device to the right people if you want to maintain the integrity of your phone.