If your phone keeps restarting by itself, the cause may be a temporary software problem, a faulty app, overheating, low storage, battery trouble, or a hardware issue.
A single unexpected restart is not always serious. But repeated restarts, boot loops, or shutdowns during normal use usually mean something needs attention.
First, Identify the Pattern
Before trying fixes, notice when the restart happens.
| What happens | What to check first |
|---|---|
| Restarts randomly during normal use | Apps, battery, software |
| Restarts while charging | Charger, battery, heat |
| Restarts during gaming or video | Overheating |
| Restarts after installing an app | Problem app |
| Restarts at the logo repeatedly | Boot loop/software issue |
| Restarts when battery is low | Battery health |
1. Restart the Phone Normally
If the phone has only restarted once or twice, start with a normal reboot.
This can clear temporary system errors and stuck background processes.
After restarting, use the phone normally and check whether the problem returns.
2. Install Software and App Updates
System bugs can sometimes cause instability.
Check for:
- Operating system updates
- Security updates
- App updates
If the restarting began immediately after a major update, monitor the phone for a short period because background optimization may still be running.
If the problem continues, look for follow-up updates.
3. Check Recently Installed Apps
A faulty or incompatible app can cause crashes or repeated restarts.
Think about whether the problem began after:
- Installing a new app
- Updating an existing app
- Installing a launcher
- Installing battery or cleaning apps
- Changing system-level permissions
If one app looks suspicious, update it or temporarily uninstall it and test the phone again.
On Android, Safe Mode can help determine whether a downloaded app is causing instability.
4. Check Free Storage
Extremely low storage can interfere with normal phone operation.
If the phone has almost no free space, remove unnecessary files such as:
- Large videos
- Downloads
- Duplicate photos
- Offline media
- Unused apps
Try to keep a reasonable amount of free space available rather than operating constantly at the storage limit.
5. Let the Phone Cool Down
Some phones may restart or shut down when they become too hot.
This can happen during:
- Gaming
- Navigation
- Video recording
- Fast charging
- Use in direct sunlight
If the phone feels unusually hot, stop using it and let it cool naturally.
Do not put it in a refrigerator or freezer.
6. The Battery May Be Failing
An aging or damaged battery can cause sudden restarts, especially when:
- Battery percentage is low
- The phone is under heavy load
- The phone is cold
- The battery percentage jumps unexpectedly
Possible warning signs include:
- Unexpected shutdowns
- Battery dropping rapidly
- Phone restarting at 20% or 30%
- Battery swelling
- Excessive heat
If the battery appears swollen, stop using the phone and arrange professional service.
7. Hardware or Power Problems May Be Involved
If software troubleshooting does not help, the problem may be hardware-related.
Possible causes include:
- Damaged power button
- Loose battery connection
- Charging port damage
- Water damage
- Mainboard fault
Hardware becomes more likely if restarting began after a drop, liquid exposure, or physical damage.
What If the Phone Is Stuck in a Boot Loop?
A boot loop means the phone repeatedly shows the startup logo but never fully starts.
Try:
- Disconnecting the charger.
- Performing a forced restart using the manufacturer’s method.
- Removing recently installed accessories if possible.
- Entering recovery or Safe Mode if supported.
Do not factory reset immediately unless you have backed up important data or understand the risk of data loss.
Should You Factory Reset the Phone?
A factory reset should be a last resort for persistent software-related restarting.
Before resetting:
- Back up photos
- Back up messages
- Back up important files
- Confirm account passwords
- Make sure cloud backups are complete
If the phone continues restarting after a clean factory reset, hardware or battery problems become more likely.
When Should You Get the Phone Checked?
Consider professional service if:
- The phone restarts several times a day
- It is stuck in a boot loop
- The battery is swollen
- The phone restarts while idle
- It shuts down at high battery percentages
- The problem started after impact or water exposure
- A factory reset does not solve the issue
FAQ
Why does my phone restart randomly?
Common causes include software bugs, faulty apps, battery problems, overheating, or hardware faults.
Why does my phone restart while charging?
Heat, a damaged charger or cable, battery problems, or charging hardware issues may be involved.
Can low storage cause random restarts?
Very low storage can contribute to instability and poor system performance.
Why does my phone restart when the battery is low?
An aging battery may struggle to maintain stable voltage under load.
Will a factory reset fix random restarting?
It may help if software is the cause, but it will not fix a failing battery or damaged hardware.
*** If the phone restarts more often when the battery is low, read why your phone battery is draining so fast.
*** If the phone becomes hot before restarting, see why your phone is overheating.
*** If the phone also feels sluggish or freezes frequently, read why your phone is running slow.