One of our customers called in last Tuesday with an iPhone stuck on the Apple logo. Restarts every 10 seconds, can't get past it, and they were convinced it was dead. Took us 15 minutes to walk them through a force restart and it booted clean. The thing is, most iPhone boot loops aren't hardware failures at all, they're usually software glitches that respond well to the right procedure. Here's exactly what we do when we see this, and how to handle it yourself.
TL;DR
iPhone boot loop fix: Force restart first (70% success rate, no data loss). Hold side button until Apple logo appears, then release. If that fails, connect to a computer and use Recovery Mode to update iOS (85% success rate). Last resort is DFU restore (90% success rate, erases all data). Most boot loops are software, not hardware.
Key Takeaways
- Force restart is your first move, 30 seconds and often sorts the problem for good
- Force restart does NOT delete data, so use it without worry
- If force restart fails, Recovery Mode with a computer works 85% of the time and also preserves data
- DFU restore is the nuclear option (erases everything) but fixes what Recovery Mode can't
- Boot loops caused only when plugged in usually signal a charging hardware issue, not software
At a Glance
- Difficulty: Easy
- Time Required: 5-30 mins
- Success Rate: 70% quick fix, 85% intermediate, 90% advanced
- Data Loss Risk: None for quick and intermediate; total data loss for DFU restore
What Causes an iPhone Boot Loop?
When your iPhone gets stuck on the Apple logo and restarts endlessly, something's interrupting the normal startup process. Most of the time this is software, a failed iOS update, a corrupted system file, a conflicting app or jailbreak tweak. The phone tries to boot, something goes wrong during startup, and it crashes back to the logo before the system finishes loading. Then it loops forever.
The less common but real cause is hardware: if your charging port or charging module is faulty, plugging in the phone can trigger a loop. We've seen dozens of those. The battery drains, the phone plugs in, charging starts, something in the usb-c-pd" class="vae-glossary-link" data-term="usb-c-pd">power delivery circuit misbehaves, and the device restarts. Unplug it and the loop stops. That's your signal to contact Apple Service rather than DIY further.
Software boot loops account for roughly 80% of what we see. Failed updates are the biggest culprit, someone interrupts an iOS update, or the download gets corrupted, or Wi-Fi drops mid-install. The phone's stuck with half-applied firmware and can't complete startup. System files also get corrupted sometimes by power loss, app conflicts, or old jailbreak remnants still lurking in the system. The good news: all of these respond to one of the three fixes below.
iPhone Boot Loop Quick Fix: Force Restart
Force Restart Your iPhone Easy
- Charge your iPhone for at least 30 minutes.
A low battery can cause the restart to fail or lock up halfway through. Plug it in and wait. Doesn't need to be fully charged, but get it to at least 30%. - Identify your iPhone model and use the correct button sequence.
Different iPhone generations use different button combos. Find yours:
iPhone 8, X, 11, 12, 13, 14, or 15 (any model): Quickly press and release the volume up button. Quickly press and release the volume down button. Then press and hold the side button (the power button on the right edge) for 10-20 seconds. Ignore the 'slide to power off' screen if it appears, keep holding.
iPhone 7 or 7 Plus: Press and hold the volume down button and the side button together for 10-20 seconds until the Apple logo appears.
iPhone 6s or older (including iPhone 6, 5s, 5, etc): Press and hold the home button (bottom center) and the top button together for 10-20 seconds until the Apple logo appears. - Hold the button(s) until the Apple logo appears on screen.
This is the key: keep holding even if you see other prompts. You might see the power-off slider, emergency SOS options, or warnings. Ignore all of those. Only stop holding when the Apple logo appears. The device will show the logo in the middle of the screen and nothing else, that's when you release. - Release the button(s) immediately when the Apple logo shows.
Don't hold any longer. The device needs to boot from here. You should see the Apple logo for 5-10 seconds, then the iPhone should progress to the home screen (or setup screen if it's a fresh restart). Wait 30-60 seconds for this. - Verify the device boots to the home screen or setup screen.
If you see the home screen with your apps and wallpaper, the boot loop is fixed. If you see a setup screen asking you to set up the device, that also means the restart worked, just follow the setup steps. If the Apple logo appears again and starts looping, the force restart didn't work. Move to the Intermediate solution below.
Why does this work? A force restart is a hard reboot of the entire system. It's like pulling the battery out of a laptop and plugging it back in. All the RAM clears, all running processes stop, and the operating system has a clean slate to boot from. If the boot loop was caused by a stuck app, corrupted temporary files, or a failed update that didn't fully apply, the force restart often gives iOS the chance to recover and finish the update on next boot.
We've seen this fix around 70-80% of iPhone boot loop cases in our remote support. The moment you call in with this problem, this is what we walk you through first. Takes five minutes on the phone, works most of the time, and you lose zero data. That's why it's the first thing to try.
iPhone Boot Loop Intermediate Fix: Recovery Mode Update
Recovery Mode Update via Computer Medium
- Plug your iPhone into a Mac or Windows PC using a USB cable.
Use an original Apple USB cable or a certified third-party cable. Cheap knockoff cables sometimes don't work reliably for this. If you don't have a cable, borrow one, this is important.
On Mac: Open Finder (not iTunes). Your iPhone should appear in the sidebar under Locations once it's connected.
On Windows: Open iTunes (download it from the Microsoft Store if you don't have it, or use the older iTunes desktop app). Your iPhone will appear when you connect it. - Force restart into Recovery Mode (not just a normal force restart).
The trick is to keep holding the button past when the Apple logo appears. Use the same button sequence as the Quick Fix, but DON'T release when the logo shows. Keep holding another 5-10 seconds until a second screen appears. You'll see a recovery mode screen: it shows a computer icon and a USB cable icon in the middle, with text that says something like 'Connect to computer' or 'Restore your device.'
For iPhone 8 and newer: Volume up, volume down, side button hold for 15-20 seconds (past the Apple logo).
For iPhone 7: Volume down + side button for 15-20 seconds (past the Apple logo).
For iPhone 6s or older: Home + top button for 15-20 seconds (past the Apple logo). - On your computer, select the Update option when prompted.
Your computer will detect the iPhone in Recovery Mode and ask you two things: Update or Restore. Choose Update. Update downloads the latest iOS firmware and reinstalls the operating system while keeping all your data, apps, messages, photos, everything stays. Restore erases everything (that's the DFU option below). - Wait for the download and reinstall to complete, this takes 15-25 minutes.
Your computer will show a progress bar. Don't disconnect the cable, don't use the phone, don't put the computer to sleep. Just wait. You'll see percentages tick up: 5%, 20%, 50%, 100%. Once it reaches 100%, the phone will restart automatically. - Let the device restart and boot normally to the setup screen or home screen.
After the update finishes, the iPhone will reboot. You'll see the Apple logo again, but this time it should finish booting and either show your home screen (if you had data) or a setup screen (if the system was reinstalled cleanly). This is normal. If you see the setup screen, tap through it or restore from a backup. - Verify the device stays booted and doesn't loop back to the Apple logo.
Give it a minute or two. Navigate around, open an app, check that everything's responsive. If the loop comes back, you'll need the Advanced DFU restore below.
Recovery Mode is a tier above force restart because it actually touches the iOS firmware. You're telling Apple's servers to send you a fresh copy of iOS, and the device installs it cleanly. If the boot loop was caused by a corrupted update or damaged system files, this usually fixes it. The key difference from DFU is that Recovery Mode preserves your data, it's a repair, not a reset.
This works about 85% of the time in our experience. It's worth the 20 minutes it takes because you keep all your stuff. We reserve DFU (which erases everything) for the cases where Recovery Mode has already been tried and failed, or where the device won't even enter Recovery Mode.
iPhone Boot Loop Advanced Fix: DFU Restore
DFU Mode Full Restore (Last Resort) Hard
- Back up your data if possible before proceeding.
DFU restore erases everything on your iPhone. If you have a recent iCloud backup, this is your safety net, you can restore from it after the device is fixed. Log into iCloud.com, go to Find My iPhone, and confirm a recent backup exists. Or open iTunes and create a backup now. This step might fail if your iPhone is already in a boot loop, but if you can get to Settings before it loops again, back up to iCloud immediately. - Connect your iPhone to a computer via USB cable.
Same cable setup as Recovery Mode. Mac with Finder, or Windows with iTunes. - Enter DFU (Device Firmware Update) Mode using a longer button sequence.
This is where DFU differs from Recovery Mode. You're going deeper into the firmware level.
For iPhone 8 and newer: Press and release volume up. Press and release volume down. Press and hold the side button for 10 seconds (do NOT release). Then immediately press and hold the volume down button for an additional 5 seconds while still holding the side button. After those 5 seconds, release both buttons. The screen should go black. You're now in DFU Mode.
For iPhone 7: Press and hold the volume down button and side button together. After 10 seconds, release the side button but keep holding volume down. Hold it for another 5 seconds. The screen goes black, you're in DFU.
For iPhone 6s or older: Press and hold the home button and the top button together for 10 seconds, then release the top button but keep holding home for another 5 seconds. Screen goes black. - Your computer will detect the device in DFU Mode and ask: Update or Restore. Choose Restore.
Restore (not Update) downloads the full iOS firmware and completely erases the device, then reinstalls iOS from scratch. This takes longer than Recovery Mode, expect 20-40 minutes, because it's replacing everything. - Wait for the full restore process to finish.
Don't touch anything. The progress bar will move slowly. You might see multiple restart cycles (Apple logo appears, disappears, reappears). This is normal. DFU restore can look chaotic compared to a regular update. Keep the cable connected and let it finish. - Once complete, set up the device as new or restore from your iCloud backup.
When the restore finishes, the iPhone will boot to the setup screen. You have two choices: (A) Set up as a new iPhone and rebuild manually, or (B) sign in with your Apple ID and restore from your recent iCloud backup. Option B is faster and gets you back to where you were. Option A is cleaner if you suspect corrupted app data caused the loop in the first place. - Verify the device stays booted and is responsive.
If DFU restore fixed it, the loop is gone for good. If the loop comes back even after DFU, this indicates a hardware problem, contact Apple Support.
DFU restore is the last software option. It completely wipes and rebuilds the iPhone from Apple's official firmware files. If Recovery Mode failed, or if you want to be absolutely certain no corrupted files remain, this is it. Success rate is north of 90%. However, and this is important, it erases everything. That's why we only recommend it after you've tried the Quick Fix and Intermediate options, and after you've backed up to iCloud.
One thing to watch: if DFU restore fails with error codes (error 9, error 4013, error 14, or others), that's a signal that hardware is involved. The computer can't talk to the device properly, or the device can't hold a connection. In that case, Apple Service is your next step. Those error codes almost always mean a failing USB port, a bad logic board connection, or a degraded storage chip. No amount of software will fix that.
When to Seek Apple Service Instead
Three scenarios mean you should stop troubleshooting and contact Apple or an authorized repair shop:
Boot loop only happens when plugged in: This is almost certainly a charging hardware issue. The device reboots when current flows through a damaged charging module or port. Try the Quick Fix with the phone unplugged. If the loop stops when unplugged but returns instantly when plugged in, hardware is the problem. Apple Service can replace the charging port or logic board section.
DFU restore fails with error codes (9, 4013, 14, 21, 3194, etc): These errors mean the computer and iPhone can't communicate reliably, or the device's storage is failing. This is beyond software. Apple's technicians have specialized tools (like JTAG interface equipment) that can sometimes fix this, but for a regular user, it's time to contact Apple.
Device feels extremely hot during any of these procedures: If the iPhone gets uncomfortably hot to the touch while you're attempting a force restart or recovery, stop immediately. Heat during startup suggests the battery is failing or a component inside is drawing excessive current. Continued attempts could cause further damage. Power off, let it cool, and take it to Apple.
Preventing iPhone Boot Loops
Most boot loops are preventable with straightforward habits:
Update only on stable Wi-Fi with plenty of battery. Never update over cellular data or with less than 50% battery remaining. Updates need a stable connection for 30+ minutes. If Wi-Fi drops halfway through or the battery dies, you get a corrupted install and a boot loop. Plug in the charger and wait for solid green Wi-Fi before you start the update.
Don't interrupt updates or force-quit the Settings app while an update is running. Let it finish. Don't use the phone, don't put it to sleep, don't unplug it. This is the single biggest preventable cause of boot loops we see. The update process writes new firmware files to storage. If you interrupt it, those files stay half-written and corrupt the system.
Use only official Apple chargers and cables. Cheap third-party charging cables sometimes cause power delivery issues that trigger reboots. Stick with Apple's cables or certified alternatives (Anker, Belkin certified). Dodgy cables are responsible for more boot loops than people realize, especially when combined with old jailbreak tweaks.
Keep your device storage under 80% full. When storage gets very full (90%+), iOS struggles to manage system files and can become unstable. Keep at least 20% free space. Delete old videos, archive photos to iCloud, and offload unused apps.
Avoid beta iOS versions unless you're a developer who knows the risks. Beta versions are untested and more prone to bugs, including boot loops. Stick with the stable release version. Same goes for jailbreak tweaks, they're a common source of boot loops because they modify core system files that should never be touched.
Back up regularly to iCloud or iTunes. If a boot loop does happen and you need DFU restore, a recent backup means you get your data and settings back within 20 minutes of setup. Without a backup, DFU restore leaves you starting from scratch.
iPhone Boot Loop Fix Summary
The iPhone boot loop fix depends on how severe the problem is. Start with the force restart, it works 70% of the time and takes five minutes. If that fails, move to Recovery Mode with a computer; that works 85% of the time and preserves all your data. Only if both of those fail should you attempt DFU restore, which works in 90%+ of cases but erases everything. Most boot loops are software issues caused by failed updates or corrupted files, not hardware. Watch for the exceptions: if the loop only happens when plugged in, or if DFU restore fails with error codes, contact Apple Service. The good news is that the vast majority of stuck iPhones can be fixed at home in under an hour using one of these three methods.