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my Phone have demo mode how i can delete this mode?
You might have a demo unit,where do you have the device from?
Sorry,we do not work for Sony. It is best that you contact xperia care and let them check the IMEI:
http://www.sonymobile.com/global-en/support/contact-us/
If the Dialer still works then Dial *#*#7378423#*#* then open Service info then Software info and report the Customization number