Share your experience!
hi guyz!!!!!! i have an issue with my phone and i hope to help me
after my new update '.201' on xperia sp ,everytime i call to someone,my screen turns black,so i cant use my keyboard or loudspeaker and the most , if i want to press a number to put card i cant .....so, anyone can help me? thank u 
maybe because i observe the switch is on!!!!!!
If you are seeing the proximity switch is "ON" when the top of the screen is uncovered then that is the problem, it should be "OFF" until covered. Anything using the switch, such as the dialler, will blank the screen if it is "ON".
@Stelaki : If other methods provided by the users who commented on this thread didn't work then i suggest you repair your phone using SUS or Sony PC Companion and then clear your internal storage from settings->backup & reset->factory data reset->tick Erase internal storage at the bottom->Reset phone. This should solve the problem. If doesn't then go to the nearest sony service center. Hope this helps.
therefore, i should be press "off" ! because i dont have screen protector???? if i understood wrong sorry !!!
ill try and this way!!!!! thank u both!!!!!!!!!!!!
ok i seee!!!!!!!!!! its on!!!!! one more question !
where i press "off"????i cant see this option except if there is on my phone !!!!!
Stelaki,
When it says "ON" during the test it means that the proximity switch is ON - it shouldn't be ON unless you have the top part of the screen covered. It should say "OFF" and then when you cover the top of the screen it changes to saying "ON". You have no other control over it other than by covering it, either with your hand during the test or your ear when making a call.
So it looks like the proximity switch is faulty as it is saying "ON" when uncovered. It is possible that an app you have installed could be affecting it so you should repeat the test in "safe mode".
If possible try and effect a repair with PC Companion or SUS but I think taking it to a Sony repair specialist is your best bet.
Dave
yes probably u have right !thank u for ur time!
hello my friends!!!!!! i have a question about this update ! i have sony experia sp , ofc i read that kit kat update is now available to all xperia Z,Z1,Z2....... but on my phone says: "under invastigation" ....but this update is super ! so , can u tell me plz if i update my xperia sp to kit kat 4.4 what will happen to my mobile???