6 Replies Latest reply: Mar 7, 2012 7:44 AM by rphunte42
william_gg_village Level 1 Level 1 (0 points)

Hello Everyone. Like many of you I have sufferred the hastle of a proximity sensor that simply doesn't work. Over the past few weeks I have trialled a number of so-called fixes and attempted to understand the cause and effect relationship of a number of variables. Here is what I have found. There are three contributing variables that stand out above all others they are screen protectors, type of bumper/protector and resetting the device. I am lucky enough to have access to a number of work colleagues and friends with problem phones with a substantial success rate. So far I have proved the performance of 14 phones with only one stubborn unit. Here is what to do. Step one, strip your phone and remove screen protectors and bumpers etc, step two: perform a reset of all settings. Step three: test using voicemail BEFORE you refit any accessories or protectors. In most cases this will work. Now if you choose to refit a screen protector you MUST cut out the section above the earpiece, this especially applies to "matte" finish protectors that cause the most trouble. I'll spare you the technical detail on refraction but this is key. Do not obstruct the sensor with the protective film. Next, avoid glitzy reflective covers such as the anodized aluminum look, again I'll skip the technicalities but these covers, especially the el cheapo two buck models are diabolical and confuse the sensor immensely. I have not had perfect results, but so far so good. I hope this helps you all. William.


iPhone 4, iOS 4.3.2
  • 1. Re: Proximity sensor solution.
    greeneturtle77 Level 1 Level 1 (10 points)

    Yeah, this is totally the case. I had a protective screen cover and a skin from skinit on my phone and took both of them off the front of my phone and and reset the phone and the proximty sensor works flawlessly now. I don't remember having this issue when it was just the clear protective screen so, I think I'll get another one of those and hope for the best. I sure don't want to scratch the screen up.

  • 2. Re: Proximity sensor solution.
    Sboq Level 2 Level 2 (430 points)

    what is the problem you are having?  the screen will not turn off while you're using the phone?  i am not having that problem and i have had a screen protector on my phone since i bought it...

  • 3. Re: Proximity sensor solution.
    william_gg_village Level 1 Level 1 (0 points)

    Hello Sboq.  This has been a considerable issue for a lot of users, the solution I have posted will fix the problem for many users. If you are one of the users that have not had this problem then that's cool, but unfortunately a fair number of users do.  There are multiple discussion threads in this forum, you might wish to look over the following threads:

     

  • 4. Re: Proximity sensor solution.
    Red_2 Level 1 Level 1 (0 points)

    What if Apple just needs to designate a button that locks the screen...

  • 5. Re: Proximity sensor solution.
    rphunte42 Level 1 Level 1 (10 points)

    I noticed that Siri wouldn't respond to the holding it up to my ear, but it always turned the screen off when I put the phone to my ear in a call, and turned back on when I took it away, so I knew the proximity sensor was working.  toggling the Siri setting off, and then on seems to have corrected my problem.  Strange.

  • 6. Re: Proximity sensor solution.
    rphunte42 Level 1 Level 1 (10 points)

    rphunte42 wrote:

     

    I noticed that Siri wouldn't respond to the holding it up to my ear, but it always turned the screen off when I put the phone to my ear in a call, and turned back on when I took it away, so I knew the proximity sensor was working.  toggling the Siri setting off, and then on seems to have corrected my problem.  Strange.

    A followup to this suggestion.

    I managed to turn the 'raise to speak' on, and test this function more throughly, and it appears that Siri uses a different sensor, and that, at least on MY phone, the sensor flashes constantly.  This has a distinctly negative effect on battery life.  Worse, turning 'raise to speak' off didn't turn off the LED.  I had to reset the phone.  Will test this again after IOS 5.1 comes out.  Hope they fix this.