Share your experience!
My Xperia keeps turning off on its own. If left idle for five minutes it totally switches off. I've had this phone repaired last July for not turning on or software issues.
I have to keep switching it on to be able to use it. Its barely two years old so not impressed by its life to be honest.
Have you dropped the phone and/or exposed it to water? have you repaired it with Xperia Companion?