Share your experience!
probably an app acting up, you might want to re-install the latest update with XC
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355
Hello!
Have you solved this issue? If so, could you please clarify how you did that? My Xperia X Performance restarts by itself about 3 times per day.
Thanks,
Dmitry