Share your experience!
SONY Xperia C4 Having Touch Issue. Even cant work to power Off or on.wherever you touch it consider in middle only.Is it happen all of sudden. Diagnosis result of touch screen is Ok.still the issue continue.
You could repair the phone with XC and test it again, btw does your phone has a protective film, glass or a case?
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355