If your Android phone keeps restarting on its own, it can feel impossible to pinpoint the cause. A random reboot every few days is a nuisance; one every few hours makes the phone nearly unusable. The good news: spontaneous reboots are almost always software-related and fixable without a trip to the repair shop.
The six fixes below run from the simplest (a 10-second force restart) to the most thorough (a factory reset), ordered from fastest to most involved. Most users resolve the problem within the first three steps, and the whole process takes under 15 minutes.
Quick Answer
Force restart your Android by holding the Power button for 10 seconds, then update all apps and your Android OS. If reboots continue, boot into Safe Mode — hold Power, long-press Power Off, tap Safe Mode. A stable phone in Safe Mode means a third-party app is causing the crash; uninstall recent apps one by one.
What’s Actually Causing the Reboots?
Spontaneous reboots usually trace back to one of five root causes. Matching your symptom to the cause helps you skip straight to the right fix.
| Symptom | Most Likely Cause | Start With |
|---|---|---|
| Reboots right after installing an app | Incompatible or buggy app | Fix 3 (Safe Mode) |
| Reboots when the phone gets hot | Overheating | Fix 2 |
| Reboots during heavy use (gaming, video) | Overheating or low storage | Fix 2, then Fix 4 |
| Reboots randomly throughout the day | OS bug or corrupted system file | Fix 1, then Fix 5 |
| Reboots only while charging | Faulty cable or battery issue | Fix 1, then Fix 6 |
Fix 1: Force Restart the Phone
A force restart clears the phone’s memory without deleting any data. It takes 10 seconds and resolves one-time software glitches that cause an unexpected reboot loop.
Steps
- Hold the Power button (or Power + Volume Down on Samsung and some Pixel models) for 10 seconds until the screen goes dark and the phone vibrates.
- Release all buttons and wait for the device to boot normally.
- Use the phone for 30 minutes. If no reboot occurs, the cause was a one-time glitch.
Pro tip: On Samsung Galaxy devices, Power + Volume Down triggers a force restart even when the screen is completely frozen and unresponsive to touch.
Fix 2: Let the Phone Cool Down
Android automatically reboots when the processor reaches a critical temperature — typically around 45–50 °C (113–122 °F). This is a protective shutdown, not a malfunction, but it does confirm overheating is the cause.
Steps
- Remove the phone case and set the device on a flat, cool surface for 10–15 minutes.
- Close all apps and avoid charging while the phone cools down.
- Feel for heat concentrated in one spot (behind the camera or the center of the back panel). Localized heat can indicate a hardware problem rather than normal processor load.
Troubleshooting tip: Overheating reboots that happen only during gaming or streaming are usually solved by removing the case and avoiding simultaneous charging. Reboots during basic tasks like calls or texting suggest a more serious hardware issue worth a technician’s inspection.
Fix 3: Boot into Safe Mode and Remove Problem Apps
Safe Mode starts Android with only built-in system apps running. If your phone stops rebooting in Safe Mode, a third-party app is the cause — and you can remove it without a full factory reset.
Steps
- Hold the Power button until the power menu appears on screen.
- Long-press Power Off (or Restart on some models) until a Safe Mode prompt appears.
- Tap OK to reboot into Safe Mode. The words “Safe Mode” will appear in the bottom-left corner.
- Use the phone normally for 30–60 minutes and watch for reboots.
- If stable, reboot normally and uninstall apps you added around the time the reboots began — one at a time, testing after each removal.
For the official walkthrough from Google, see their Android Safe Mode guide.
If individual apps were already crashing before the reboots started, see 7 Reasons Your Android Apps Keep Crashing — and How to Fix Each One for deeper app-level diagnosis.
Fix 4: Free Up Internal Storage
Android needs at least 500 MB to 1 GB of free internal storage to write temporary system files reliably. When that space disappears, the OS can crash the device mid-task.
Steps
- Go to Settings > Storage and note how much free space remains. If it’s under 1 GB, proceed.
- Clear app cache for your largest storage consumers: Settings > Apps > [App Name] > Storage > Clear Cache.
- Back up photos and videos to Google Photos and delete the local copies — this typically recovers the most space in the least time.
For a complete step-by-step walkthrough, see Android Storage Full: Clear Gigabytes of Space in Under 10 Minutes.
Fix 5: Install All Pending Updates
Manufacturers regularly release patches that address system instability and known reboot bugs. Running an outdated OS is one of the most common reasons random restarts persist for weeks after trying other fixes.
Steps
- Go to Settings > System > Software Update. Samsung devices use Settings > Software Update; Pixel devices use Settings > System > System Update.
- Tap Check for Updates and install anything available.
- Update all apps: open Google Play Store, tap your profile icon, then Manage Apps & Device > Update All.
- Restart the phone after all updates complete to apply the changes.
Fix 6: Factory Reset (Last Resort)
A factory reset wipes software corruption and returns Android to a clean state. It resolves problems that survive all other fixes. Back up everything first — the process removes all local data, apps, and settings.
Steps
- Back up your data: Settings > Google > Backup > Back Up Now. Confirm photos are synced to Google Photos before continuing.
- Go to Settings > System > Reset Options > Erase All Data (Factory Reset).
- Confirm and let the process complete — it usually takes 5–10 minutes.
- Set up the phone as new, restore only essential apps first, and monitor for reboots over 24 hours before restoring everything else.
If the phone still reboots after a clean factory reset, the problem is hardware — a failing battery, damaged motherboard, or water intrusion. A certified repair center is the correct next step.
Common Mistakes to Avoid
- Skipping the Safe Mode test. Many people jump straight to a factory reset when Safe Mode would have revealed a single bad app in under an hour. Always test Safe Mode before wiping the device.
- Using the phone while it’s cooling down. Running apps during an overheating episode keeps the temperature elevated and triggers more shutdowns. Set the phone aside completely for at least 10 minutes.
- Reinstalling every app at once after a factory reset. Adding everything back in bulk reintroduces the problem app without isolating it. Restore apps in small batches and monitor between each one.
- Clearing the system cache partition. Some older guides recommend this step from recovery mode. On Android 10 and later it rarely solves reboot problems and can introduce new OS errors — skip it.
- Replacing the battery as the first fix. A failing battery does cause reboots, but mostly on phones three to four years old or those with visible swelling. Exhaust all software fixes before paying for a replacement.
Frequently Asked Questions
Why does my Android restart only at night?
Scheduled app updates and OS downloads often install between midnight and 6 AM, triggering an automatic reboot. Check your Play Store auto-update schedule and System Update settings to control when updates run.
Can malware cause an Android to keep restarting?
Yes, though it is uncommon. Malicious apps can destabilize Android and trigger reboots. Safe Mode isolates the issue — if reboots stop, uninstall suspicious apps and run a scan via Google Play Protect in the Play Store menu.
My phone reboots only while charging. Is the charger the problem?
Often, yes. A counterfeit or damaged cable delivers inconsistent voltage and can trigger a protective shutdown. Try a certified manufacturer cable and adapter. If the problem persists, the charging port may need cleaning or professional repair.
How long does an Android factory reset take?
The reset itself takes 5–10 minutes. Initial setup and restoring your backup adds another 15–30 minutes depending on how much data you have stored.
Is it normal for an Android to restart once in a while?
One spontaneous reboot every few weeks is generally harmless — usually a minor system hiccup. More than once a week is the threshold where the fixes above are worth working through.
Conclusion
In most cases, a force restart, a Safe Mode test, or freeing up storage is enough to stop an Android phone from rebooting on its own. Start with Fix 1 and work down only as needed — the majority of users resolve this without ever reaching a factory reset.
If battery performance is also suffering, the Android battery drain guide covers the next set of settings worth checking.
Last updated: June 22, 2026