Sony Xperia SP - Screen won't light up during calls!

[ehrimen]

I can make calls and receive calls but when I call someone the screen goes black and it's not lighting up again, except the other person hangs up the phone. I've tried to go back to factory settings but it still the same.

Btw, I have no cover or screen protector.

[Samuel1]

Seems strange. Have you tried repairing the phone software via PC Companion? If not, give it a try:

http://www.sonymobile.com/update

What are your thoughts about this forum? Let us know by doing this short survey.

[ehrimen]

I did but did not work.

I've find a way to check to promixity switch which is '' *#*#7378423#*#* '' and it seemed ON. I read it somewhere that I should plug in and out the earphone cable and voila, it turned to OFF. And problem was solved.

But again, it turned into ON by itself, even though I made it off again, It's turning back to ON again and again.

Isn't there a way to keep this option OFF all the time? This is a serious problem, please give me some solution other than giving it back to Sony to check the device, I need the phone.

[Samuel1]

Well, unfortunately there isn't really much I can do but recommend you to send it in to a service center. Contact your local Xperia Support for more information:

http://www.sonymobile.com/global-en/support/contact-us/

[Dreamnine]

Same problem here, and it's a serious issue.

On a call, as soon as I put the phone up to my ear the screen blanks out and stays that way when I lower it...so there is no way to access the screen at all during the call.

I've found I can only hang up by enabling Power Button Ends Call under Settings>Accessibility.

So I'm making the bulk of my calls using speaker phone.

[Thoscellen1]

I have the same issue on my phone, but not always : If I hold off my head from the phone before 1 min after the screen has turned off, the screen bringht on light and work fine. After 1 min, the screen stay black and definitivly.

1 min I say ?  It's exactly the time that I have configured for the screen autolock .

- Settings > Display > Sleep  > After 1 minute of inactivity

- Settings > Security > Automatically lock > Immediatly after sleep

- Settings > Security > Screen lock > PIN (or other than No and Swipe)

So my hypothesis is that the auto lock prevent the screen to be turned on even if any mecanical button is pushed. Why ? I don't know, but I think that if the auto lock, or the sleep, or the screen lock, is disabled, the bug will vanish.

A tips that work sometime is to hold the camera button, to take a picture : It's possible event if the sreen is off and close. If the screen briefly turn on, push the Home button to go to the lock screen.

A more brutal way to end a call is to eject the SIM card (trigg a phone reboot :x )

-- Edit --

After some search, the screen protection seems to be also a cause of the bug. I will try to make a little hole in it to see if it's works.

Someone say that shake the phone is a solution and work some times.

[Sam]

 After some search, the screen protection seems to be also a cause of the bug. I will try to make a little hole in it to see if it's works.

---

Screen protectors are often the cause of issues with the proximity sensor, it is always worth removing any screen protector you may have (not the anti shatter film though!) to see if the problem continues.

---

Don't forget to mark posts that answers the topic as Accepted Solution. 
If you find any post helpful, press Kudos.
What are your thoughts about this forum? Let us know by doing this short survey.

[Roses_Thorne]

I just bought my Xperia SP in September, and when I've made or had calls on it, the same thing happens, with the screen blacking out and being unable to "wake" it back up to end the calls.  I don't use a screen protector (haven't bought one yet), so I know that's not the issue.  My poor dad had to listen to a 5 min voice mail rant of me trying to end the call I made to him.  I even tried to shut it down completely, but couldn't even do that.  I was completely locked out.   I am currently trying the repair method that was suggested, but in reading this thread, see that it has a strong chance of not working. 

Am wondering if any further investigation/solutions have been persued, considering this seems to be a wide-spread problem?

[TCrown]

This is not a problem with any individual phone, but a shortcoming of the Sony's version of Android that affects all Xperias SP if the user enables a screen lock and the proximity sensor is enabled. 

The short answers - Sony geniuses simply didn't program the phone to account for this scenario, which on Samsung and iPhone is handled as it should - whever you pull the phone away from your face the screen comes back on. Alas, it's just Sony engineering, so don't bother sending your phone in for a repair.

[Neds]

Is anyone from Sony going to reply to this or just ignore us?!

Why not update the phones software to give us an option to switch the proximity sensor off...?