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Android Phone Keeps Restarting - Fix Guide
Fix an Android phone that keeps restarting or rebooting on its own with proven solutions.
🚨 30-Second Quick Fix
- 1Check if the phone feels hot — if yes, let it cool for 15 minutes before continuing
- 2Check Settings > Storage — if less than 10% free, delete files immediately
- 3Check Settings > Battery for any apps using excessive power
Solution 1: Check for Overheating
Android phones restart themselves as a safety measure when the processor overheats. This is one of the most common causes of random restarts, especially during summer or when using demanding apps.
- 1Feel the back of the phone — if it's hot to the touch, overheating is the likely cause
- 2Remove the phone case to improve heat dissipation
- 3Close all running apps and let the phone cool for 10-15 minutes
- 4Avoid using the phone whilst charging — this generates significant heat
- 5If restarts only happen during specific activities (gaming, navigation), reduce usage intensity
Solution 2: Boot into Safe Mode
Safe mode disables all third-party apps. If your phone stops restarting in safe mode, a recently installed app is causing the problem.
- 1Press and hold the Power button
- 2Long-press Power Off until the Safe Mode prompt appears
- 3Tap Safe Mode (or OK) to confirm
- 4Use the phone for 30-60 minutes to see if it restarts
- 5If stable in safe mode, restart normally and uninstall recently installed apps one by one
Solution 3: Check Battery Health
A degraded battery can cause voltage drops under load, triggering the phone to shut down and restart. This is especially common on phones older than 2-3 years.
- 1Samsung: Go to Settings > Battery > Battery Health (or dial *#0228#)
- 2Pixel: Go to Settings > Battery > Battery Health — look for capacity percentage
- 3Other devices: Install AccuBattery from the Play Store and charge fully to see health estimate
- 4If battery health is below 80%, consider a battery replacement
Solution 4: Free Up Storage Space
When internal storage is critically low (below 5-10% free), Android cannot create temporary files needed for normal operation. This can cause system instability and random restarts.
- 1Go to Settings > Storage to check available space
- 2Aim for at least 10-15% of total storage free
- 3Delete old downloads, clear app caches, and remove unused apps
- 4Back up photos and videos to cloud storage, then remove from device
Solution 5: Wipe Cache Partition
Corrupted system cache files (often caused by a recent OS update) can cause repeated restarts. Wiping the cache partition clears these files without affecting your personal data.
- 1Power off the phone completely
- 2Enter recovery mode: Samsung: Volume Up + Power | Pixel: Volume Down + Power | OnePlus: Volume Down + Power
- 3Use Volume buttons to navigate to "Wipe Cache Partition"
- 4Press Power to select and confirm
- 5Select "Reboot System Now"
Solution 6: Check for Scheduled Auto-Restart
Samsung phones have a built-in auto-restart feature that reboots the phone at a scheduled time (usually during the night). If you've noticed restarts at the same time each day, this is likely the cause.
- 1Go to Settings > General Management > Reset > Auto Restart
- 2Check if this feature is enabled
- 3Disable it if you don't want automatic restarts, or adjust the schedule
🔍 Why This Happens
Overheating Protection
The phone shuts down and restarts to prevent thermal damage to the processor and battery. This is a safety feature, not a fault.
Degraded Battery
When a battery's capacity degrades below 80%, it can no longer sustain voltage under heavy load. The sudden voltage drop causes the phone to shut off as if the battery died, even though it shows 20-40% charge.
Buggy Third-Party App
An app with a critical bug can cause a system-level crash that forces Android to restart. This is especially common with apps that request extensive system permissions.
Corrupted System Update
If a system update was interrupted or didn't install correctly, corrupted system files can cause instability and repeated restarts.
Critically Low Storage
Android requires free storage space for swap files and temporary data. When storage is nearly full, the system becomes unstable and may restart unexpectedly.
🛡️ Prevention Tips
- ✓Keep at least 15% storage free at all times
- ✓Avoid heavy use whilst charging — gaming or GPS navigation whilst plugged in generates excessive heat
- ✓Update apps and OS regularly — stability patches fix known restart issues
- ✓Replace your battery after 2-3 years of use or when health drops below 80%
- ✓Only install apps from the Play Store — sideloaded apps are more likely to cause system instability
⚠️ When to Seek Professional Help
- •Phone restarts in safe mode (ruling out third-party apps)
- •Restarts persist after a factory reset
- •Phone becomes extremely hot before each restart
- •Battery health is below 80% — consider a battery replacement
- •The phone is under warranty
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