How To Fix It If iPhone 12 Keeps Rebooting By Itself After iOS 14.3

In this troubleshooting guide, we will show you what to do if your iPhone 12 keeps rebooting by itself after updating it to iOS 14.3. Most of the time, it’s just due to a software-related problem that you can fix on your own. Read on to learn more about it. 

Random reboots can be a sign of a battery problem. However, most of the time, it’s just due to some software-related issues, which can be fixed if you’re only willing to troubleshoot your device. If it’s a hardware problem, then there’s only so much you can do about it. But if it’s just a firmware problem, it will be fixed and you can make your device work smoothly again. So if you’re one of the users with this kind of problem, then here’s what you should do: 

First solution: Charge your iPhone

The purpose of this procedure is actually not to replenish the battery of your device. Instead, it will tell you right off the bat if the problem is with the battery or with the firmware. 

So before anything else, connect your iPhone 12 to the charger using the original lightning cable. 

If the problem is with the battery, then the random reboots should not occur once your iphone is connected to the charger. The power adapter serves as the power source. But if that’s the case, the best thing you can do is bring your device to the Genius Bar and have it checked.

However, if your device still reboots even if it’s connected to its charger, then the problem is with the firmware. You can fix it by doing the following solutions.  

Second solution: Force restart your device

Your iPhone may have already rebooted several times, and if it’s caused by a firmware issue, those reboots don’t have benefits. 

The next thing you should do to try and fix this problem is the Forced Restart. Doing so will refresh your iPhone’s memory, as well as reload all its services and apps. This procedure is effective in fixing minor firmware problems. Here’s how you do it: 

  1. Quickly press and release the Volume Up button and then the Volume Down button. 
  2. Immediately after that, press and hold the power key for 10 seconds. It will force your iPhone to shut down and power back up. 
  3. Once the Apple logo shows, release the power key and allow the device to continue the boot process. 

If it’s just a minor firmware problem, then it should be fixed by now, but if it continues to bug you, then try the next solution. 

Third solution: Reset all the settings

After doing the previous solution and your iPhone 12 still keeps rebooting by itself, what you have to do next is to reset its settings. It’s possible that this issue is caused by some incorrect settings. Doing so will bring all the settings back to their default values. This is how it’s done: 

  1. From the Home screen, tap Settings. 
  2. Find and tap General. 
  3. Scroll down to the bottom of the screen, and then touch Reset. 
  4. Touch Reset All Settings. 
  5. If prompted, enter your security lock. 
  6. Tap Reset All Settings at the bottom of the screen, and then tap Reset All Settings again to confirm. 

After doing this, continue using your iPhone to see if the problem is fixed. 

Fourth solution: Factory reset your iPhone

If your iPhone 12 continues to reboot by itself even after doing the previous solutions, then you have no other choice but to reset it. A factory reset will fix performance-related issues including this one. But before you actually do that, make sure to create a backup of your important files and data as they will be deleted. 

Once you’re ready, follow these steps to reset your device: 

  1. From the Home screen, tap Settings. 
  2. Find and tap General. 
  3. Scroll down to the bottom of the screen, and then touch Reset. 
  4. Tap Erase All Contents and Settings. 
  5. Tap Erase Now. 
  6. If prompted, enter your security lock. 
  7. Tap Erase iPhone at the bottom of the screen.  
  8. Tap Erase iPhone again to proceed.  
  9. Now enter your Apple ID password, and then tap Erase to proceed with the reset. 
  10. Wait until your iPhone has finished the reset, and then set it up as a new device. 

Your iPhone 12 should work properly after this, and it should be running smoothly now without restarting by itself.

And that’s what you need to do if your iPhone 12 keeps rebooting on its own. We hope that this guide can help you one way or the other. 

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