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 11:05 PM in response to mdalegre

The solution to this issue is very simple. I had a few friends complaining about that, then I realized that they were using iPhone 3G(S) cases or protections.

So just told them to stop using these protections and to consider buying ones designed specifically for iPhone 4. And voila, the problem was GONE and never reappeared since!
So just don't use iPhone 3G(S) cases or protection and you'll not experience this problem anymore.

Why using iPhone 3G(S) case or protection provoke this issue? Simply because the proximity sensor(s) is not in the same place on the iPhone 4 than on the iPhone 3G(S)! So the case or protection is disturbing it.

If you do experience problems anyway even without using any case or protection, then your iPhone has an issue and you should exchange it for another one.

Jun 28, 2010 11:15 PM in response to mdalegre

This also has been a been a frequent problem with my iPhone 4. I went to the local Apple Genius Bar yesterday, but the iPhone's proximity sensor worked fine while it was being examined by the Genius technician. The problem continued repeatedly today. I've just scheduled another appointment with Apple for tomorrow.

I'm also having a few other technical issues with the phone.... I've been getting a "NO SIM" message in the upper left corner of the screen, requiring me to reboot the phone each time it appears. Additionally, the phone has been dropping calls when I hold it in my left hand.

I'll probably return the phone and go with something else instead.

Jun 28, 2010 11:44 PM in response to iphone4_925

Unfortunately the Bluetooth has muffled voice quality that the listener can't hear me. So I guess iPhone 4 is epic failed. The location of the proximity is on top o f the ear piece and this will easily trigger the sensor sensing no object in front when the phone is slightly pointing upward toward.

I thought Bluetooth might solve the problem but it turns out that another issue has just been discovered!!!!!!

Jun 28, 2010 11:54 PM in response to JrnyMan

JrnyMan wrote:
So happy to hear it's not just me. I've hung up on several people as a result of the proximity sensor not working properly. I never had problems with this on my 3G, but the iPhone 4 isn't working the same. I knew something was up when I asked my wife "where are you that a dog is barking" only to discover my cheek had navigated to the alarm sounds and the barking dog was on my phone.

I then figured the work-around would be to lock the screen when I make/receive a call. That's when I discovered the new "feature" that if you're using the handset, the on/off button no longer locks the screen -- instead it terminates the call!

So they not only broke the proximity sensor, but they took out the only decent work-around, too!

And to rub salt into the wound, the Apple support rep I spoke to confirmed that this new "Feature" that the on/off button ends calls isn't even in the manual anywhere. Genius! Sheesh.....




double click the power button and it will lock the screen. Single click ends the call.

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Issue with Proximity Sensor during calls

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