01-01-2017 08:23 PM
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  1. lauriej's Avatar
    just wanted to say thank you for this was also having problem of screen staying black when moving phone away from ear and after call ended. was about to return phone for replacement. straw and blowing threw earpiece speaker seems to have worked.
    02-11-2014 09:40 PM
  2. Hermann Yepdjio's Avatar
    Hey. just got the same issue and blew the earpiece with an compressed air but nothing happened. then I tried to blow it with my mouth and guess. it works fine now. just blow as much as you can with yr mouth and the issue will be solved
    03-28-2014 01:36 PM
  3. Blood Less's Avatar
    I have the same issue that seemed to only happen after the last mini-update to the S4.

    In any event, blowing hard into the earpiece did not work.
    I looked at the sensor, and it looked fine.

    I then dialed *#0*# to get to the diagnostic mode, and clicked on SENSOR.
    I then watched the sensor value change from around 75 (with nothing near it) to 255 (max) when I had my hand up to it.

    SO, this leads me to believe that the sensor DOES in fact work - it SEES my HAND.
    Did the last mini-SW-update screw something up ?

    This is very annoying, as whenever I make a call, the screen immediately turns off.
    I have to click the center button to turn on the display to enter digits, end the call, etc.
    The proximity sensor won't function properly in a call.

    I then googled this issue some more and came across this link:
    http://forum.xda-developers.com/show....php?t=2684507

    The ONE thing that made me consider what was suggested in the post was to install a FREE app called "Proximity Sensor Finder".
    Even though the diagnostics I ran (*#0*#) seemed to show that the sensor was indeed seeing my hand moving closer/away from it - this APP showed me that it was in fact NOT working properly.
    (The app will show you an 8.0 when nothing is in front of it, then 0.0 when sensor is covered - BUT, it should go immediately BACK to 8.0 when you remove your finger from the sensor. My S4 did not go back to 8.0, it actually stayed at 0.0.)
    This, and only this convinced me that I really needed to take the phone apart and "clean" the proximity sensor and lens holes.

    Basically, if you follow the link - it explained how to disassemble the S4, and how to clean out the sensor, and the chassis/body of the proximity sensor.
    I was hesitant to do this - not being comfortable taking apart such a delicate piece of technology, but the instructions, (and video) were extremely helpful and made it easy. (thanks Internet and Youtube !)

    In any event, once I had it all apart, and I had the sensor out - I looked at it and it honestly looked clean, but I cleaned it with a Q-tip and blew air on it just in case.
    The real issue was the (inside) of the chassis / display lens holes for the sensor, etc.
    I did not see any dust or debris, but what I DID see looked like a waxy film which was coating the inside of the lens holes of the display.
    I could not see that when the phone was assembled (it honestly looked clean to me from the outside).
    This explains why simply blowing air into the earphone (with the phone still assembled) did NOT work for me.
    It wasn't dust/debris, but some dirty "coating" that would (never) be able to be removed by just blowing air on it.

    So, I cleaned all that with the Q-tip, put it all back together and fired it up.
    Low and behold, it now WORKS like it used to !!!
    I am SO glad I found that link (see above) and followed the instructions and had the guts to take the phone apart - since blowing air into it would never have worked.

    I write this in the hope that it may convince others with this issue to take the leap and take the phone apart to clean the affected parts - as there will be NO other way to fix it other than this.

    What bothers me the most about this is the fact that this can even happen in the first place, and that I'll probably have to do it again when it gets "gummed up" in there in a few weeks/months, etc...
    I would not have thought that the proximity sensor would be THAT sensitive/finicky that a bit of dirt, dust, film, whatever would cause it to not work properly.

    Perhaps the most recent update that Samsung did to the phone changed a sensitivity parameter - basically making the proximity sensor not work as originally engineered. I say this because I could swear that this problem ONLY happened after doing the last system update about a month ago.
    Model sgh-i337m
    Android version 4.4.2
    Kernel version 3.4.0-1529758 thu may 1 23:08:25 KST 2014
    Build Number K0T49H.i337mvlufne1
    Evan Chandler likes this.
    05-30-2014 04:47 PM
  4. Tracey Egerton's Avatar
    Hello can anyone help me please. My partner brought me a Samsung s4. When a call or message comes through should there be a light on front to show you this message. Thank you. Tracey.
    11-20-2014 02:56 PM
  5. Little Justice286's Avatar
    I'm not familiar enough with this one
    11-26-2014 10:07 AM
  6. Little Justice286's Avatar
    Please discuss this issue.
    11-26-2014 10:08 AM
  7. hajbujo's Avatar
    Hi I have registered to thank you all for the great ideas and great fixes . I had the same proximity sensor issue on my galaxy s5 mini .The problem was the glass screen protector ,as soon as I took it off it worked like a charm. I guess Im going back to the good old plastic screen protector .
    12-02-2014 08:33 PM
  8. tristqnelson's Avatar
    Thanks Bearda! You are the man! All i had to do was blow in the earpiece and the problem was solved. No can of air was even required. Thanks!
    12-16-2014 12:10 PM
  9. Spurtz's Avatar
    This is an older thread, but I'll add my experience: same issue with my S4, where the screen would turn off fine during a call, but would not wake up upon removing it from my ear - I had to press the home key to re-activate the screen. So, I tried the compressed air, no dice. Cleaned the phone, still nothing. BUT...then I noticed it worked just after I wiped it down. Not because of dirt but because it wasn't in the case any longer!

    I have mine in an Otterbox Defender, and the cutout at the top of the phone is evidently too narrow and it interferes with the sensor. 100% success without the case, and 0% success with it.

    Who woulda thunk it?
    03-18-2015 01:54 PM
  10. dglange's Avatar
    Amazing.... Thank you... Blowing air worked!!!!!!
    07-19-2016 06:04 PM
  11. tmscas's Avatar
    Brand new and already had this problem but corrected by jet of air thanks
    01-01-2017 08:20 PM
  12. tmscas's Avatar
    New phone right out of box and have issue already. A jet of air corrected good as new Thanks
    01-01-2017 08:23 PM
37 12

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