So your iPhone keeps restarting on its own, and you have a feeling last night’s update is to blame. You are not alone. This is one of the most common complaints after a new iOS release, and it can range from mildly annoying to completely unusable depending on how often it happens.
The good news is that most cases are fixable without panic or a trip to the Apple Store. Let’s walk through what is causing this and how to solve it step by step.
What Causes an iPhone to Keep Restarting After an Update?
An iOS update rewrites parts of your phone’s operating system. When something goes wrong during that process – whether due to a software bug, low storage, or a faulty battery – your device can get stuck in a restart loop.
Some of the most common causes include:
- Software corruption during the update installation
- A bug was introduced in the new version of iOS
- A battery that can no longer handle the power demands of the updated system
- An app that conflicts with the new iOS build
- Underlying hardware damage that the update exposed
If you have also noticed your iPhone screen is black, but the phone is still on, or the Apple logo keeps appearing and disappearing, those are strong signals that something deeper needs attention.
9 Fixes to Try Before Anything Else
Force Restart Your iPhone
This is always the first step. A force restart clears temporary system errors without erasing any data. On most modern iPhones, press and quickly release Volume Up, then Volume Down, then hold the Side button until the Apple logo appears.
Charge Your Battery First
A weak or unstable battery can cause unexpected restarts, especially after an update pushes new demands on the hardware. Plug your phone in and let it charge to at least 50 percent before troubleshooting further. If you have been wondering why your iPhone battery health is draining so fast, this issue and the restart problem may be connected.
Delete Recently Installed Apps
Some apps are not immediately compatible with a fresh iOS build. Go to Settings, check your recently updated or installed apps, and delete any that behaved oddly after the iOS 18 update.
Free Up Storage Space
Low storage can cause the operating system to fail during or after an update. Go to Settings, then General, then iPhone Storage, and remove anything you do not need.
Update or Reinstall iOS Through iTunes or Finder
Connect your iPhone to a Mac or PC, open Finder or iTunes, and choose Update. This can resolve software corruption without wiping your data. If that does not work, choose Restore – but back up first.
Reset All Settings
This option does not erase your data, but it does reset every setting to the default. It can resolve conflicts left behind by the update. Go to Settings> General> Transfer or Reset iPhone, then Reset All Settings.
Check for a Follow-Up iOS Update
Apple Inc. often releases a patch shortly after a problematic update. Go to Settings> General, Software Update, and install anything available. A stable patch can fix the exact issue you are experiencing.
Factory Reset as a Last Resort
If nothing else works, a factory reset may be necessary. This erases everything on the device, so back up to iCloud or your computer first. This approach is typically reserved for cases where software corruption runs deep.
Get the Battery Replaced
iPhones with older or degraded batteries are far more likely to experience unexpected restarts after a major iOS update. If your phone is two or more years old, this could be the real cause.
You can learn more about common signs your iPhone needs repair to see if your symptoms point to a battery issue specifically. For hands-on help, consider professional iPhone battery replacement in Fort Worth, TX.
When the Problem Is Hardware, Not Software
Not every restart issue is a software problem. If your phone is overheating, showing a blue screen of death-style error message, or restarting even in safe mode, the issue could involve damaged hardware – such as a faulty motherboard connection or a sensor that was compromised before or during the update.
If you are also dealing with your iPhone getting hot while charging or other unusual behavior, those are signs that the problem goes beyond what a software fix can resolve.
A skilled technician can run diagnostics, check for physical damage, and determine whether a repair – rather than a reset – is what your phone actually needs.
Conclusion
An iPhone that keeps restarting after an update is frustrating, but it is rarely a permanent problem. Work through the fixes above in order, starting with the simplest options before considering a factory reset. If the issue continues, don’t keep hoping it will fix itself; bring it in for a proper diagnosis.
The team at Fort Worth iPhone Repairs has seen this issue many times and can troubleshoot your device quickly. Walk-ins are always welcome, and most repairs are done the same day. Reach out to know more.