Apps & performance

Phone restarts randomly on its own

Random restarts are usually caused by a software crash, an app conflict, or overheating, but frequent restarts can also point to a battery or hardware problem.

Difficulty
Moderate
Time
20–40 minutes

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

  1. Note when the restarts happen: a specific app, during charging, or randomly.
  2. Update the OS and all apps, since restart bugs are commonly patched.
  3. Uninstall any recently installed app that lines up with when restarts started.
  4. Check if the phone feels hot before restarts and let it cool if so.
  5. Check battery health in settings for signs of degradation.
  6. Back up your data in case a factory reset becomes necessary.
  7. 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.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.