Symptoms
- Phone reboots without warning during normal use
- Restarts happen more during certain apps or charging
- Phone feels warm before restarting
- Restarts have become more frequent over time
Likely causes
- CommonSoftware crash or bug in the OSA crashed core process can trigger an automatic restart to recover.
- CommonA specific app conflicting with the systemPoorly optimized apps can cause instability severe enough to force a reboot.
- PossibleOverheating triggering a protective restartPhones can reboot to prevent damage when internal temperature gets too high.
- PossibleFailing or swollen batteryAn unstable power supply from a bad battery can cause unexpected shutdowns and restarts.
- Less commonCorrupted system filesDeep OS-level corruption can cause recurring instability.
What to do
- Note when the restarts happen: a specific app, during charging, or randomly.
- Update the OS and all apps, since restart bugs are commonly patched.
- Uninstall any recently installed app that lines up with when restarts started.
- Check if the phone feels hot before restarts and let it cool if so.
- Check battery health in settings for signs of degradation.
- Back up your data in case a factory reset becomes necessary.
- If restarts continue after a reset, treat it as a likely hardware issue.
When to call a pro
Frequent unexplained restarts that survive a factory reset usually indicate a hardware fault, most often the battery, and should be checked by a repair professional.
Safety
Use caution
If the phone is visibly swollen, extremely hot, or the back panel is bulging, stop using and charging it immediately and have a professional inspect the battery.