Rebooting all the time

Hello, my fairphone turns off and turns on itself, sometimes several times a day

Randomly or in specific situations? And do you get an error message before, like “Unfortunately Fairphone OS has stopped”?

I’d say it’s either an app causing the problem (probably one with root access) or a faulty OS installation.

If you can’t find the cause of the problem you should do a thorough backup and then reinstall the OS. If that doesn’t help do a hard reset (erases everything from your phone) and then restore your backup.

Randomly, and I didn’t seen an error message about OS. I will try what you tell me and I will see what happens afterwards. Thank you