Issue with Proximity Sensor during calls

I'm having an issue with the Proximity Sensor not properly detecting when i'm holding my phone to my ear. I can confirm that the iPhone sensor is working by covering it with my finger, but when held to my face, the screen blinks as if it cannot decide to disable the screen or enable it. It results on me hanging up, putting calls on mute, and dialing numbers accidentally while i'm on the phone. This occurs on 90% of my calls. Is anyone else experiencing this issue. I would like to confirm whether this is a software issue (Proximity Sensor sensitivity too low) or a design issue (sensor now placed towards the end of the phone).

Macbook Pro, Mac OS X (10.6.4)

Posted on Jun 23, 2010 8:09 PM

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1,688 replies

Jun 28, 2010 8:05 PM in response to mdalegre

I'm having the same problem - well this and a couple of other problems, but let's not go there right now.

As for the proximity sensor, I have put people on mute, dropped calls, dialed numbers (and the associated beeps) while on the phone with someone, I even had an instance where my cheek selected "Contacts", then a contact, then ringtone and then actually played the ringtone, all while I was on a call.

Very frustrating. Looking forward to a fix...

Jun 28, 2010 8:14 PM in response to mdalegre

I've having this problem too. I've only received the phone this morning and I've accidentally muted the phone numerous times. Earlier tonight while talking to my girlfriend somehow I managed to put that call on hold and call someone else. The phone also gets hot from the display being on all the time. How annoying, never had these problems with my 3G.

Jun 28, 2010 8:37 PM in response to mdalegre

I thought I would chime in on this. Another person posted in this same forum about using an old 2G case for a 3G phone caused a similar issue.

How many are using an old 3G or 3GS case?

First night I got the phone I used it to talk to a work associate for 2 hours during a business call. I hung up on him twice, sent him a text and several other odd things during our call. I finally sat the phone down and put on speaker and it was fine.

Tonight I noticed, thanks to another who posted here, when _*I remove it from my 3G leather case*_ and talk on the phone, I do not have the same issues. I believe it was my leather case tripping the proximity sensor. I guess I'm going to have to stop being a tight * * * and buy myself a real iPhone 4 case.

Jun 28, 2010 8:55 PM in response to mdalegre

Add me to the list as well. Was on a call and started hearing DTMF tones. The other party was on a desk phone and nowhere near the keypad. I pulled the phone away and hid the keypad. A few moments later, I heard the audio switch from my ear to the bottom speaker. Pulled phone away from my ear and speakerphone had turned on from face contact.

Looks like there is a definite issue judging by the number of reported cases on this and other forums.

And just for good measure, I'm not using a case at the moment. Got a black bumper for me, but gave it to the wife until the colored ones come out for her to choose from.

And for additional good measure.. I have the reception issue as well but the bumper case does eliminate it when it's on my phone.

Jun 28, 2010 9:11 PM in response to XDacy

One work-around that really isn't much of a work-around is to press the "Home" button while you're on a call. This will at least prevent putting the other person on hold, activating Facetime, etc. At worst you might launch Plants vs. Zombies or something instead of calling your boss at an odd hour of the night. I really wish Apple would acknowledge this and address it a little better than they are. It seems like everyone that calls Applecare is told they are the first to report it. Amazing but not magical or revolutionary.........

Jun 28, 2010 9:51 PM in response to mdalegre

For the last few days I have been hanging up on family, putting calls on speakerphone, hanging up on Skype calls, and wondering what the Google app is doing... now to find out that it's the proximity sensor and that I'm not the only one.

I don't use a case. It happens regardless of whether I'm holding the phone or resting it on my shoulder.

So, is it hardware or software?

Does anyone have an iPhone 4 without this problem?

Jun 28, 2010 9:56 PM in response to univ0298

I have the same problem. Tried the reset all fix which didn't fix it. I took the phone out of my old 3G phone case that I am using until my new 4 case arrives. The proximity sensor worked correctly with the phone out of the case! If you are using an old case, try removing your phone from the case and test again to see if this fixes your problem. It worked for me. The reset all may have contributed to fixing the problem so try that also along with taking it out of the case. I'm modifying my case (Sena) until I get my new case.

Jun 28, 2010 10:15 PM in response to mdalegre

I thought that I was holding the Phone wrong 🙂 I am experiencing the same issue. When On a call and holding the phone to my ear, the phone screen switches on then off. If I move even an inch when the screen is on, one of the buttons (hold, spearkerphone, etc) will engage. At this point I have to pull the phone away from my ear and then press the button that was activated and then put the phone to my ear again.

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Issue with Proximity Sensor during calls

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