If your phone keeps restarting, it is usually caused by software glitches, faulty apps, outdated operating systems, damaged files, overheating, battery problems, or internal hardware faults. A device stuck in a constant restart cycle is commonly known as a boot loop issue, where the phone repeatedly turns off and starts again without reaching the home screen.
In this guide, we explain practical ways to fix a phone that keeps restarting, including checking recent apps, using safe mode, updating software, clearing cache through recovery mode, and identifying when professional hardware repair is required.
Table of Contents
Why Does a Phone Keep Restarting?
A phone restarting once in a while can happen due to a temporary software error. However, if your device is restarting randomly, getting stuck on the logo screen, or restarting multiple times throughout the day, there is usually an underlying problem.
From our experience repairing smartphones, the most common causes include:
| Cause | How It Creates Restart Problems |
|---|---|
| Faulty applications | Poor quality or damaged apps can interfere with system files |
| Software bugs | Updates or corrupted system files can trigger restart cycles |
| Storage problems | Low storage can prevent the operating system from working properly |
| Battery failure | A weak battery may not provide enough power to keep the phone running |
| Overheating | Excess heat can force the phone to restart for protection |
| Hardware damage | Internal faults can cause continuous rebooting |
Both Android and iPhone devices can experience this issue. Whether you have an iPhone restarting problem or your Android keeps rebooting, the troubleshooting process starts by identifying whether the cause is software or hardware related.
1. Restart Your Phone and Check for Temporary Software Errors
Before trying advanced solutions, perform a simple restart manually.
Sometimes a temporary system crash can cause the phone to repeatedly restart. Turning the device off completely allows the operating system to reload properly.
Try these steps:
- Hold the power button.
- Select the power off option.
- Wait around 30 seconds.
- Turn the phone back on.
If the phone stuck in restart problem continues, move to the next troubleshooting steps.
2. Check Recently Installed Third-Party Apps
One of the most common reasons behind a phone keeps restarting fix is a problematic application.
A newly installed app may contain bugs, conflict with the operating system, or consume excessive system resources. In many repair cases, removing a recently installed application solves the problem immediately.
Common warning signs include:
- Restarting started after installing a new app
- The phone restarts when opening a specific application
- The device becomes slow before restarting
- Battery drains unusually quickly
How to Remove Problematic Apps on Android
Go to:
Settings → Apps → See All Applications
Find recently installed applications and uninstall anything suspicious.
Pay special attention to:
- Unknown security apps
- Battery-saving apps
- Phone cleaners
- Modified versions of popular apps
- Apps installed outside official stores
Keeping applications updated is also important. Developers regularly release fixes for bugs that may affect device stability.
| Action | Benefit |
|---|---|
| Update existing apps | Fixes known bugs |
| Remove unused apps | Reduces system load |
| Avoid unknown apps | Prevents malware and instability |
According to Android Help guidance, keeping apps and operating systems updated reduces compatibility problems and improves device reliability.
3. Check Background Apps and Storage Usage
Too many background apps running at the same time can overload older devices.
When applications continue running in the background, they consume:
- RAM
- Battery power
- Processing resources
In some cases, this can trigger restarting problems.
To check:
Settings → Battery → Background Usage
or:
Settings → Applications → Running Services
Close unnecessary applications and remove apps you no longer use.
A phone should generally have enough free storage space for normal operation. If your storage is almost full, remove:
- Large videos
- Duplicate photos
- Unused applications
- Downloaded files
4. Use Safe Mode to Find the Cause
If your device keeps rebooting, safe mode is one of the best ways to identify whether a third-party app is responsible.
When a phone starts in Safe Mode, it only loads essential system applications. Downloaded applications are temporarily disabled.
If the phone works normally in safe mode, a third-party app is likely causing the issue.
How to Enter Safe Mode on Android
The exact steps depend on your phone model, but generally:
- Press and hold the power button.
- Select power off.
- Turn the device on again.
- Hold the volume down button while the device starts.
- Continue holding until Safe Mode appears in the bottom corner.
Once inside Safe Mode:
- Test your phone for a few minutes.
- Remove recently installed apps.
- Restart normally.
To exit safe mode, simply restart your phone.
If the device continues rebooting even in Safe Mode, the problem may not be caused by applications.
5. Update Your Phone Software
Outdated software is another common reason for a phone keeps restarting fix.
Manufacturers release updates to fix:
- Security problems
- System crashes
- Compatibility issues
- Performance bugs
Check for updates:
Android:
Settings → System → Software Update
iPhone:
Settings → General → Software Update
Before installing updates:
- Connect your phone to Wi-Fi
- Charge the battery
- Back up important data
A failed update or interrupted installation can sometimes create a reboot loop, so proper preparation matters.
6. Clear Cache Using Recovery Mode
If your phone is still restarting, clearing cache through recovery mode can help fix corrupted temporary files.
Cache files help your device load faster, but damaged cache data can create system errors.
Before entering recovery mode, ensure important files are backed up.
Some Android devices support clearing cache without deleting personal data.
Steps to Access Android Recovery Mode
The button combination varies by manufacturer, but commonly:
- Power off the device.
- Press and hold the volume button and power button together.
- When the phone vibrates, release the power button.
- Wait for the Android System Recovery menu.
Using volume buttons:
Select:
Wipe Cache Partition
Confirm using the power button.
After cache data is removed, select:
Reboot System
This may solve a reboot loop caused by corrupted temporary files.
Recovery Mode Options Explained
| Option | What It Does |
|---|---|
| Wipe Cache Partition | Removes temporary system cache |
| Reboot System | Restarts the phone normally |
| Factory Reset | Deletes all data and restores factory settings |
A factory reset should only be used as a final solution.
It can help when software corruption is severe, but all personal files, photos, and apps will be removed.
Always:
- Back up your data
- Save contacts
- Store important files safely
If recovery mode does not solve the restarting issue, professional diagnosis may be required.
7. Factory Reset as a Last Software Solution
A factory reset restores your phone to its original settings.
It can fix:
- Serious software conflicts
- Corrupted system files
- Persistent restarting issues
However, it removes:
- Applications
- Photos
- Messages
- Personal settings
Before performing a reset:
- Back up your data.
- Remove your Google or Apple account if required.
- Ensure you know your account passwords.
Factory reset is not a guaranteed solution if the problem is caused by hardware damage.
8. Check for Battery and Hardware Problems
If software troubleshooting does not work, the cause is likely hardware-related.
Common hardware reasons include:
- Weak battery
- Damaged charging port
- Water damage
- Faulty motherboard components
- Power management issues
A failing battery may cause:
- Sudden shutdowns
- Restarting when opening apps
- Restarting at a certain battery percentage
- Poor battery performance
At iRepair Mobiles Basingstoke, we often see devices where customers try multiple software solutions but the real issue is a damaged internal component.
Professional Hardware Repair for Restarting Phones
When your phone has a hardware problem, professional testing is the safest option.
At iRepair Mobiles Basingstoke, our expert technicians inspect devices using proper diagnostics before recommending repairs.
Common repairs include:
- Battery replacement
- Charging port repair
- Internal component replacement
- Motherboard-level diagnostics
For example, Samsung devices experiencing constant restarting may require component testing rather than simple software changes.
Many repair centres provide diagnostics before repair. If your device is still under manufacturer warranty, contacting the manufacturer may be the better option.
If your warranty has ended, professional repair can often cost much less than purchasing a replacement phone.
Mobile Repair Diagnostic Process
| Step | What Happens |
|---|---|
| Initial assessment | Technician checks symptoms and device condition |
| Hardware diagnostics | Internal components are tested |
| Fault identification | The exact cause is determined |
| Repair quotation | Customer receives repair cost details |
| Repair process | Faulty components are replaced |
At iRepair Mobiles Basingstoke, standard diagnostics are designed to identify the cause before any repair work begins. Many repairs can be completed within 48 hours depending on parts availability and the complexity of the issue.
When Should You Visit a Repair Specialist?
You should consider professional help if:
- Your phone restarts after a factory reset
- The device gets stuck on the manufacturer logo
- The phone has water or physical damage
- The battery drains extremely quickly
- The phone becomes completely unresponsive
Continuing to force restart a damaged phone may make the problem worse.
A technician can determine whether repairing the device is worthwhile compared with replacing it.
Final Thoughts – Fixing a Phone That Keeps Restarting
A phone that keeps restarting is usually caused by a software problem, faulty application, damaged cache files, battery failure, or internal hardware issue. Start with simple fixes like removing problematic apps, checking updates, and testing safe mode. If the problem continues, recovery mode and professional diagnostics can help identify the real cause.
At iRepair Mobiles Basingstoke, we repair smartphones from major brands including Samsung, Apple, and other Android manufacturers. Our technicians focus on finding the actual fault instead of recommending unnecessary replacements.
If your device has a boot loop issue, restarting problem, or refuses to stay powered on, professional diagnosis can save time, money, and your important data.
