Fix the iPhone that keeps restarting or is stuck on the Apple logo loop. Works with iPhone 15, 16, 17 on iOS 17, 18, and 26. Easy, proven troubleshooting guide.
Is your brand-new iPhone 15, iPhone 16, or even the latest iPhone 17 restarting on its own out of nowhere? Or maybe it’s stuck in an endless boot loop, flashing the Apple logo but never fully turning on? You’re not the only one — this problem has been reported by thousands of iPhone users, especially after updating to iOS 17/18/26.
It’s frustrating. Random restarts can cause you to lose unsaved data, miss calls or messages, and disrupt your daily use. But don’t worry — in most cases, the problem can be solved with simple troubleshooting.
This guide will walk you through why your iPhone keeps restarting and the exact fixes — from quick DIY tricks to advanced solutions. Let’s dive in.
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Why Does My iPhone Keep Restarting Randomly?
Your iPhone could be restarting repeatedly due to one or more of these reasons:
- Software Bugs or Glitches
- Failed iOS update (common with iOS 17/18/26).
- Corrupt or buggy apps are crashing the system.
- Jailbreaking errors that compromise stability.
- Overheating
Using your iPhone while charging, gaming, or multitasking can cause it to overheat, triggering automatic shutdowns or restarts. - Battery or Power Issues
- Old or degraded battery (below 80% health).
- Loose battery connection.
- Full battery drain is causing corrupted files.
- Hardware Damage
- Water damage.
- Logic board or RAM faults.
- Impact damage from drops.
- Storage & Connectivity Issues
- iPhone running out of storage space.
- Interrupted Wi-Fi/iTunes connection during updates.
What Is an iPhone Boot Loop?
A boot loop is when your iPhone tries to power on but fails — showing the Apple logo, turning off, and repeating the cycle endlessly.
This usually happens after:
- A failed iOS installation.
- A corrupt backup or faulty restore.
- A drained or damaged battery.
- Interrupted update via iTunes/Finder.
Check this article for how to Fix an iPhone or iPad Stuck on Lock Screen or Pin
Backup Before Fixing iPhone Restart Problems
Before you attempt any fix, make sure you backup your iPhone to avoid losing photos, videos, contacts, or notes.
Backup with iCloud:
- Connect the iPhone to Wi-Fi.
- Go to Settings > [Your Name] > iCloud > iCloud Backup.
- Tap Back Up Now.
Backup with iTunes/Finder:
- Connect your iPhone to your PC or Mac.
- Open iTunes (Windows/macOS Mojave) or Finder (macOS Catalina and later).
- Select your iPhone > Back Up Now.
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Basic Fixes to Stop iPhone 15/16/17 Keeps Restarting
If your iPhone restarts randomly but still boots up, try these quick fixes first:
1. Drain and Recharge the Battery
Let your iPhone fully discharge until it powers off. Then, recharge it to 100% in one go.
2. Remove the SIM Card
Sometimes, network or SIM glitches cause restart loops. Remove the SIM, wait, then reinsert.
3. Delete Unused or Buggy Apps
Go to Settings > General > iPhone Storage and uninstall apps you don’t use. Buggy apps can trigger reboots.
4. Hard Reset Your iPhone
- iPhone 15/16/17: Volume Up -> Volume Down -> Hold Power until Apple logo.
- iPhone 7/7 Plus: Hold Power + Volume Down.
- iPhone 6s or earlier: Hold Power + Home button.
5. Update iOS to the Latest Version
Go to Settings > General > Software Update. Install any available update, as Apple frequently fixes reboot issues.
6. Restore Using iTunes
- Connect your iPhone to your computer.
- Open iTunes > Select iPhone > Restore iPhone.
- Confirm with Restore and Update.
Warning: This erases all data unless you restore from backup.
7. Enter Recovery Mode
- iPhone 15/16/17: Volume Up -> Volume Down -> Hold Power until Recovery screen.
- iPhone 7: Power + Volume Down.
- iPhone 6s or earlier: Power + Home.
Then, choose Update (to keep data) or Restore.
8. Contact Apple Support
If your iPhone still restarts after all steps, it may be a hardware issue. Visit the Apple Store or an Authorized Service Center.
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Advanced Fixes for iPhone Boot Loop
If the basic solutions fail, try these advanced methods:
1. Update iOS via iTunes/Finder
Connect to a computer and update the firmware directly.
2. Restore iPhone Completely
Use Restore iPhone in iTunes/Finder to reinstall iOS.
3. Recovery Mode Restore
Put the iPhone in Recovery Mode and select Restore.
4. DFU Mode Restore (Deep Restore)
DFU Mode completely wipes firmware + iOS and reinstalls from scratch. Use this only if nothing else works.
5. Restore from a Previous Backup
If a recent update caused the loop, restoring from an older backup may help.
6. Hardware Check at Apple Support Center
If software fixes don’t work, it’s likely a battery, logic board, or water damage issue. Apple diagnostics can confirm and repair.
Other Common iPhone Boot Loop Problems
Besides the restart loop, you may see:
- iPhone stuck on Apple logo.
- iPhone is stuck with a progress bar.
- iPhone on black screen with spinning wheel.
- iPhone stuck on the Hello screen.
- iPhone keeps turning off randomly.
- iPhone is dead and won’t turn on.
- iPad keeps restarting, too.
Most of these issues share the same causes: software glitches, failed updates, battery faults, or hardware problems.
Also, check this article - How To Fix Liquid or Water Damaged iPhone
Final Thoughts
A randomly restarting iPhone 15/16/17 or an iPhone stuck in a boot loop can be annoying, but it’s not the end of the world. Start with basic fixes like draining the battery, removing the SIM, or updating iOS. If that doesn’t work, move on to Recovery Mode, DFU restore, or restoring from a backup.
And if nothing helps, it’s time to let Apple diagnose the hardware.
With these steps, you should be able to stop your iPhone from restarting repeatedly and get it back to working smoothly again.
FAQs: Fix iPhone Keeps Restarting & Boot Loop
Q1: Why does my iPhone 15/16/17 keep restarting after the update?
A failed or buggy iOS update (like iOS 17/18/26) often causes restart loops. Try updating again via iTunes/Finder or restoring in Recovery Mode.
Q2: How do I fix an iPhone stuck in the Apple logo boot loop?
Force restart your iPhone. If it still loops, connect to iTunes/Finder and choose Update or Restore. DFU Mode can also resolve this.
Q3: Will I lose data if I fix the boot loop iPhone?
Not always. Force restart, update, or reset settings won’t erase data. But restoring via iTunes/DFU will — so always backup first.
Q4: Can a bad battery cause an iPhone restart loop?
Yes. A degraded battery can’t supply stable power, making your iPhone turn off and on randomly. Check Battery Health under Settings.
Q5: What should I do if none of the fixes work?
If your iPhone keeps restarting after all software fixes, it’s likely a hardware issue. Visit Apple Support or an Authorized Service Provider for repair.