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A phone that restarts itself randomly — sometimes several times a day — is unreliable and often a sign that something is wrong at either the software or hardware level. Pinpointing the cause determines whether a simple settings change will fix it or whether a hardware repair is needed.
Software Causes
Recently installed apps are the most common trigger. If reboots began after installing a new app, that app is likely the cause. It may be poorly coded, consuming excessive RAM and triggering a system crash, or conflicting with a core system process. Uninstall recently added apps and monitor whether reboots stop.
Operating system corruption can also cause random reboots. Clearing the cache partition through recovery mode (no data loss) is the first step. If reboots continue, a factory reset — backing up data first — will eliminate any corrupted system files.
Check for an OS update. Manufacturers sometimes introduce reboot bugs in major updates and issue a fix in subsequent patches. Check your software update settings.
Hardware Causes
A failing battery is a hardware cause of random reboots. When battery voltage drops sharply under load, the processor resets rather than shutting down cleanly. This mirrors the unexpected shutdown problem and has the same solution — battery health check followed by replacement if degraded.
Loose internal connectors from a prior drop or repair can intermittently disconnect and cause reboots. A technician can reseat these during a physical inspection.
Water damage to the motherboard can cause erratic behaviour including random reboots as components short intermittently.
Systematic Approach
Uninstall suspect apps → clear cache partition → update OS → test in safe mode → replace battery if degraded → factory reset as last software resort → hardware inspection if reboots persist after all software steps.
Random reboots are almost always solvable. Work methodically through software causes first — they are both more common and less expensive to fix than hardware faults.
