Symptoms
- Apple logo appears and stays on screen
- Phone restarts and shows the logo again repeatedly
- Screen goes black then shows the logo again
- Happened after an update or after the phone died
Likely causes
- CommonInterrupted software updateA power loss or crash mid-update can leave the system files incomplete.
- CommonCorrupted system fileA damaged file can prevent the OS from finishing its boot sequence.
- PossibleFailing storage chipOn older devices, a degrading storage chip can cause repeated boot failures.
- PossibleA recently installed app or profile conflicting with startupCertain configuration profiles can interfere with normal boot.
- Less commonHardware fault after physical damageA drop or liquid exposure shortly before this started could point to hardware damage.
What to do
- Force restart the phone using the correct button sequence for your model (varies by iPhone generation).
- If it boots normally, back it up immediately in case the issue returns.
- If it loops again, connect it to a computer and put it into recovery mode following Apple's on-screen steps.
- Choose 'Update' in the connected computer's software first, which tries to reinstall the OS without erasing data.
- If Update fails or isn't offered, choose 'Restore,' which erases the phone and reinstalls the OS from scratch.
- After restoring, set up as new or restore from your most recent backup.
- If recovery mode itself fails to detect the phone, this points to a hardware issue needing professional repair.
Tools and parts
- Computer with cable
When to call a pro
If recovery mode can't detect or restore the phone, or the loop returns immediately after a restore, take it to an authorized repair shop for a hardware diagnosis.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.