Why my phone reboots itself

Frequent reboots on a Vivo S1 phone could be caused by various factors, such as software glitches, incompatible apps, or hardware issues. To troubleshoot:

1. Update Software: Ensure your phone's operating system and apps are up to date.

2. Remove Problematic Apps: Uninstall apps that might be causing conflicts or crashes.

3. Clear Cache: Clear app cache and system cache from the settings.

4. Safe Mode: Boot the phone in safe mode to check if a third-party app is causing the issue.

5. Factory Reset: If the problem persists, perform a factory reset as a last resort.

6. Hardware Issues: If none of the above works, there might be a hardware problem. Contact Vivo support or visit a service center.

Remember to back up your data before attempting any troubleshooting steps that might result in data loss.