If your iPhone 8 Plus suddenly started crashing, restarting randomly, or freezing after updating to iOS 11.4, you’re not alone. These post-update bugs can be super frustrating—especially when your phone was working perfectly before.
Here are several proven fixes you can try to stop your iPhone from crashing or turning off unexpectedly.
1. Close All Background Apps
Corrupted background apps can cause major slowdowns, system glitches, and crashes.
- Double-press the Home button to open the app switcher.
- Swipe up on each app preview to close them one by one.
- Once done, go back to the Home screen and use your phone normally to check for improvements.
2. Restart or Force Restart Your iPhone
A soft reset is a quick way to clear minor memory glitches.
To restart:
- Press and hold the Power button until “slide to power off” appears.
- Slide to turn off, wait 30 seconds, then power back on.
To force restart:
- Quickly press and release Volume Up, then Volume Down.
- Press and hold the Side button until the Apple logo appears.
No data will be deleted using these methods.
3. Check and Free Up Storage Space
A full or nearly full storage can trigger performance issues and app crashes.
- Go to Settings > General > iPhone Storage.
- Review what’s taking up space and delete any unneeded apps, videos, or large files.
- Also clear out the Recently Deleted folder in Photos to fully free up space.
4. Reset All Settings
Sometimes an update will mess with your settings in ways that aren’t easy to see. Resetting them can help.
- Go to Settings > General > Transfer or Reset iPhone > Reset.
- Choose Reset All Settings.
- Enter your passcode, then confirm.
This won’t delete your personal data, but Wi-Fi passwords and settings like Do Not Disturb or accessibility options will be reset.
5. Restore Your iPhone Using iTunes (Recovery Mode)
If the phone is still crashing or freezing, try a full restore through iTunes or Finder.
⚠️ This will erase your iPhone, so be sure to back up your data first.
- Connect your iPhone to a computer with iTunes (or Finder on macOS Catalina or later).
- Put the device in recovery mode:
- Press and quickly release Volume Up, then Volume Down, then press and hold the Side button until you see the Connect to iTunes screen.
- iTunes/Finder will detect the device in recovery mode. Choose Restore.
- Follow the prompts to reinstall iOS.
Once it finishes, set up your iPhone and test it before restoring a backup.
Extra Tips to Prevent Future Crashes
- Avoid running too many apps at once, especially memory-heavy ones.
- Update apps regularly from the App Store.
- Restart your iPhone weekly to keep memory fresh.
- Keep iOS updated whenever Apple releases new bug fixes.
Still Not Fixed? Contact Apple Support
If your iPhone continues to crash even after a full restore, it might be a hardware issue—especially if it’s overheating, battery drains fast, or it was dropped recently.
Contact Apple Support or visit a Genius Bar to get your device inspected. If your iPhone is under warranty, repairs or replacement might be covered.