If your Android phone keeps restarting on its own, it is usually caused by a failing app, a lack of storage space, or an outdated operating system. Sometimes, a faulty power button or a degrading battery can also trigger unexpected reboot loops. Below, we will walk you through the exact steps to diagnose the problem and fix your phone for good.
Why Does My Android Phone Keep Restarting? (Common Causes)
When your phone reboots randomly, it is usually a built-in safety feature designed to protect your device from hardware damage or software crashes. Understanding the root cause helps you apply the right fix quickly.
- Third-party app crashes: Rogue applications that are not optimized for your Android version can force the system to crash and restart.
- Low storage space: If your internal memory is completely full, Android lacks the temporary space it needs to run background processes smoothly.
- System software glitches: Bugs in your current Android operating system or interrupted security updates can cause instability.
- Battery degradation: Old lithium-ion batteries lose their ability to hold a steady voltage. When you open a heavy app, the sudden power drop causes the phone to shut down.
- Physical hardware damage: A stuck power button or internal moisture damage can trigger continuous reboot loops.
Quick Comparison: Software vs. Hardware Fixes
| Issue Type | Symptoms | Common Solution | Difficulty Level |
|---|---|---|---|
| Software | Random reboots after installing an app | Safe Mode, Cache Clear, Factory Reset | Easy to Medium |
| Hardware | Reboots during calls or heavy gaming | Battery replacement, button repair | Advanced (Repair shop) |
Step-by-Step Guide: How to Fix a Phone That Keeps Restarting
Follow these troubleshooting steps in order. Start with the easiest software solutions before moving on to hardware checks.
Step 1: Boot Your Phone into Safe Mode
Safe Mode temporarily disables all third-party apps you downloaded from the Google Play Store. If your phone stops restarting in Safe Mode, you know a downloaded app is the culprit.
- Press and hold the Power button until the power menu appears on your screen.
- Tap and hold the Power Off or Restart icon until a “Reboot to Safe Mode” prompt appears.
- Tap OK to confirm.
- Watch your phone for a few minutes. If it stays on, uninstall your recently downloaded apps one by one until the problem stops.
Step 2: Check for System Updates
Running an outdated version of Android can cause compatibility errors that lead to random reboots.
- Open your phone’s Settings app.
- Scroll down and tap System or Software Update.
- Select System Update or Download and Install.
- If an update is available, download and install it, then restart your phone normally.
Step 3: Free Up Internal Storage Space
When your Android device has less than 10% free storage remaining, the system can freeze and reboot unexpectedly.
- Open Settings > Storage.
- Tap Free up space to let Android automatically delete junk files and unused apps.
- Manually delete large video files, unused games, or move photos to cloud storage like Google Photos.
Step 4: Wipe the Cache Partition
Corrupted system cache files often confuse the operating system and trigger reboot loops.
- Turn off your phone completely.
- Press and hold the Power and Volume Down (or Volume Up, depending on your brand) buttons simultaneously until the recovery menu appears.
- Use the volume buttons to highlight Wipe cache partition.
- Press the Power button to select it.
- Once complete, select Reboot system now.
(Note: Wiping the cache partition does not delete your personal photos, contacts, or messages.)
Step 5: Factory Reset (Last Resort)
If software troubleshooting fails, a factory reset will return your phone to its original out-of-the-box state.
- Back up all important data to Google Drive or a computer before doing this.
- Go to Settings > System > Reset options > Erase all data (factory reset).
Pros and Methods of Professional Repair
If you have tried all software fixes and your phone still reboots, the issue is likely hardware-related.
- Pros of visiting a repair center: Technicians can accurately test battery health and replace worn-out hardware safely.
- Real-world context: Phones that have suffered water damage or severe drops often develop microscopic board fractures that cause random power cycles, requiring professional micro-soldering or component replacement.