iPhone Problems

iPhone Keeps Restarting after iOS 15 Update? Here's The Fix

by Jenefey Aaron   Updated on 2021-09-18 / Update for  Fix iPhone

I have an iPhone XS Max that was working fine when I was using it but now that I started using it it keeps restarting itself and I’m not sure what to do and it’s updated to iOS 15."

-- Apple Support Communities

Now and then we can find people seek solutions for "why does my iPhone keep restarting", "iPhone keeps restarting when trying to restore", "my iPhone keeps turning on and off", or "My phone keeps restarting itself after newest update". It could be disastrous when something get wrong with our device. So we are up here with 8 methods to fix the iPhone keeps restarting with iOS 15 or earlier.

8 Solutions To Fix iPhone Keep Restarting

Before using tips below to fix iPhone restarts itself, you'd better backup your iPhone beforehand because some tips will erase all data on your iOS device. If you don't want to lose a bite of data, then we strongly suggest you directly using the Solution 7 without data loss.

Solution 1: Hard Reset Your iPhone

Sometimes, by performing a hard reset simply takes away the bug. So if something is bothering your iPhone and making the iPhone keeps restarting over and over, you can hard reset your device to make it work normal. Follow below steps to perform a hard reset and solve iPhone keeps on restarting issue.

If you own iPhone 12 to 8, swiftly press the volume up button and then the volume down button, then press the side button until you see the Apple logo displayed on the screen.

If you own iPhone 7/7 Plus, press and hold the Sleep/Wake button along with the volume down button. Release once the Apple logo is displayed on the screen. For earlier iPhone models, hold the Home and Power button.

force restart iphone

Solution 2: Check for Faulty Apps and Remove them

Sometimes, the issue is not with your iPhone or iPad, but the apps in your device are responsible for the abnormal behavior and cause iPhone keeps turning off and back on. It may happen that a few apps are faulty and having bugs. This will result in a strange behavior, that is, iPhone turns off by itself or frequently restarting of iPhone/iPad. So simply find such apps and delete them from your phone. Follow below steps to find the faulty app and remove it:

  • Go to Settings > Privacy > Analytics > Analytics Data. Scroll down the list to find any apps appeared.
  • If you can find one app there, go back to Home screen and long press the faulty app icon that you wish to remove. Tap on Remove APP > Delete to confirm.
  • If the app icon jiggles after you long press the app icon, tap on the Remove icon at the top left corner of the app icon > Delete App > Delete to confirm > Done

Solution 3: Update the iOS to the Latest Version

If your iPhone keeps restarting and get stuck on apple logo, then probably it is something related to the software instead of hardware. And here, when we say software, we point to the operating system. There might be some glitches in the operating system that may lead your device to abruptly shut down. Hence, if you have not updated your device to the latest version of iOS, this is the right time. New iOS update might have some patches or fixes for iphone keeps restarting itself issue.

Here is the step-by-step guide as to how can update your device to the latest iOS version and solve iPhone constantly rebooting problem.

  • Head to the Settings and then go to General. Click on the "Software Update" option.
  • If you have the latest iOS version, then a message will be shown stating the version number of the iOS and "Your software is up to date" message. If you do not have the latest version, download it. The installation process will begin automatically.

    update ios version

Solution 4: Reset All Settings

Reset all settings on iPhone is an easy way to help you fix iOS problems like iPhone reboot loop caused by software issues. Go to Settings > General > Reset > Reset All Settings to restore your iPhone's settings to factory defaults. No data loss will caused by this method.

update ios version

Solution 5: Remove Your SIM Card

If your iPhone has problems to connect to your wireless carrier, it will also lead to iPhone boot loop. A simple trick to resolve this problem is to remove the SIM card from iPhone and see if everything is ok now.

You do not need to worry removing SIM card could cause any damage. Your iPhone will automatically reconnect to your carrier as soon as you put it back on.

If removing the SIM card resolves the iPhone reboot loop issue, put the SIM card back in your iPhone to see whether the problem happens again. If the problem reoccurs after inserting the SIM card, you'll need to replace the SIM card with your carrier.

Solution 6. Restore Your iPhone Using iTunes

iTunes restore is a common way to solve many iOS problems. The defect of this method is that all data will get erased after restoring. Before you restore with iTunes, make sure your iPhone is backed up. You can free backup your iPhone beforehand using iCareFone.

  • Launch iTunes on your computer and connect your iPhone/iPad with a USB cable.
  • On the iTunes, click on your iPhone icon and then look for the "Summary"; tab on the left side panel.
  • Under the "Summary"; tap on the "Restore iPhone" button and then confirm your actions by tapping "Restore" when prompted.

    restore iphone

Solution 7: Fix iPhone Keeps Restarting without Data Loss

This is the recommended way to fix problems with iOS system. Tenorshare ReiBoot is professional iOS repair software that can fix over 150 types of iPhone problems effectively. So, it certaily can fix iPhone keeps restarting/stuck in reboot loop problem. What makes it distinct is your device data still keeps intact after standard system repair.

Below is a step-by-step guide to solve the iPhone 12 to iPhone 5s randomly restarts.

  • Download and launch the Tenorshare ReiBoot software on your PC or Mac. Once you have downloaded the device, connect your device using a USB cable.

  • As soon as your device is detected, click on Start > Standard Repair to recover iOS system by downloading the newest firmware package.

    download firmware package online
  • Once the package is successfully downloaded, tap on "Start Standard Repair" option to start recovery of the system.

    start standard repair
  • Well, wait for a few minutes to finsh the process, click Done and then your iPhone will restart after system recovery. You can now use your iPhone without any abruptly restarts.

    repair successfully

The following video will show you how to fix these problems like iphone boot loop and iPhone getting stuck on Apple logo.

Solution 8: Check for Hardware Issues

Hardware problem such as water damage will also cause iPhone keep restarting. So check if there is a hardware issue with your iPhone. And if possible, make an appointment with the Genius Bar and get help at your local Apple Store.

Why Does My iPhone Keep Restarting

Well, there can be numerous answers for why iPhone randomly restarts. The reason can be as simply as a faulty app or as complicated as a software bug. And in any case, you need to get out of the problem, and you must have known the solutions to fix exactly your iPhone/iPad is behaving abnormally now. Check the following few things to know why is your iPhone keeps restarting:

  • A recent update
  • Hardware failure
  • Any software bug, for example, iOS 15 bug
  • Installing a third-party app

Apart from technical issues, other things can also create problems such as:

  • Cold weather
  • Fishy and fake apps in your iPhone


Long story short, we had a look on the full solutions to solve iPhone keeps restarting/rebooting problem. Apart from the common tips that may help relieve the problem, you can use the system repair tool ReiBoot to fix the problem by several clicks.

Fix iPhone Stuck Issues without Data Loss

  Updated on 2021-09-18 / Update for  Fix iPhone

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