Android smartphones are powerful and flexible, but sometimes they can get stuck in a bootloop (restarting endlessly) or experience constant app crashes. These issues can make your device unusable or unstable — but the good news is that most can be fixed with simple troubleshooting steps.
This
UltraTechGuide article explains how to safely fix Android bootloop and
app crash problems, from basic resets to advanced repair tools.
🔁 1. What Is an Android Bootloop?
A
bootloop happens when your Android phone keeps restarting and never
reaches the home screen.
It can be caused by:
- Corrupt system files after an update or app install
- Incompatible apps or mods
- Failed root or custom ROM flash
- Low storage space or bad cache
- Corrupted firmware
⚙️ 2. Fixing Android Bootloop (Step-by-Step)
Step 1: Soft Reset the Device
- Hold the Power button +
Volume Down until the phone turns off.
- Wait 10 seconds and turn it on
again.
🧠
This simple restart can fix temporary memory or system glitches.
Step 2: Boot into Safe Mode
Safe
Mode loads only system apps, bypassing faulty third-party apps.
1.
Hold Power button → Tap and
hold Power off → Select Safe Mode.
2.
If the phone boots properly,
uninstall recently installed or suspicious apps.
3.
Restart normally to exit Safe Mode.
Step 3: Wipe Cache Partition
Corrupted
system cache can trigger bootloops.
1.
Power off the phone.
2.
Press and hold Volume Up + Power
+ Home (or Power + Volume Up, depending on model).
3.
Use volume keys to navigate to Wipe
Cache Partition, then press Power to confirm.
4.
Reboot the device.
⚠️
This does not delete personal data — only temporary system files.
Step 4: Use Recovery Mode to Fix System Errors
If
wiping the cache doesn’t work:
1.
Enter Recovery Mode again.
2.
Select Repair System or Reboot
to Bootloader (if available).
3.
Use ADB (Android Debug Bridge)
to reinstall system files or push updates:
4. adb
reboot recovery
5. adb
sideload update.zip
Step 5: Perform Factory Reset (Last Resort)
If
the device still won’t boot:
1.
In Recovery Mode, select Wipe
Data/Factory Reset.
2.
Confirm and reboot.
⚠️
This erases all personal data — make sure you’ve tried backups or ADB file
recovery first.
📲 3. Fixing App Crashes and Force Close Errors
Constant
app crashes can happen due to:
- Outdated app versions
- Corrupted app cache or data
- Low storage
- Conflicts with Android updates
Step 1: Clear App Cache and Data
1.
Go to Settings → Apps → [App
Name] → Storage.
2.
Tap Clear Cache → then Clear
Data (if necessary).
3.
Reopen the app.
Step 2: Update or Reinstall the App
- Open Google Play Store →
search the app → tap Update.
- If still crashing, uninstall
and reinstall the app.
Step 3: Free Up Internal Storage
Android
needs at least 10–20% free space to run smoothly.
- Delete old downloads, unused
apps, or move photos to cloud storage.
- Use Files by Google → Clean
Junk Files feature.
Step 4: Check for System Updates
App
crashes often result from outdated Android versions.
- Go to Settings → System →
System Update → Check for updates.
- Install and restart the phone.
Step 5: Reset App Preferences
If
multiple apps crash:
1.
Go to Settings → Apps → Menu (⋮) → Reset app preferences.
2.
This restores all default app
settings without deleting data.
🧰 4. Advanced Android Repair Tools
If
the problem persists, try using PC repair utilities:
|
Tool |
Use |
|
ADB
& Fastboot |
Access device even when stuck in
bootloop |
|
Samsung
Smart Switch |
Reinstall firmware for Samsung
devices |
|
Xiaomi
Mi Flash Tool |
Flash official ROMs safely |
|
Dr.Fone
– System Repair (Android) |
Fix OS issues without data loss |
|
Tenorshare
ReiBoot for Android |
One-click repair for stuck screens
and boot errors |
💡
Always download tools from official websites to avoid malware.
🧠 5. Prevent Future Bootloops and App Crashes
1.
Avoid
Unverified Custom ROMs or Mods.
2.
Keep
Storage at 20% Free Space —
prevents cache corruption.
3.
Update
Apps Regularly — fixes bugs that trigger crashes.
4.
Use
Trusted Security Apps — to prevent malware interference.
- Restart the Phone Weekly — clears temporary system cache.
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