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i've never had an issue. I got my phone in early august.

I do, however, have intermittent wifi issues. Kinda annoying...
 
Continue to have the problem here. Apple has replaced my my iPhone 4 on 4 separate occasions. Eventually I gave up and installed Call Guard. The apple genius got a kick out of the screen capture I did with call guard. 152 touches to the screen, in the shape of my ear, on one 2.3 min phone call. Let's hope it's fixed for real on the next iPhone.
 
Anyone else recently try replacing their iPhone 4 due to the proximity sensor and got it replaced via the silent recall?
 
They replaced my girlfriends phone right away. It was ok at first but it seems go mess up every once in a while. Hmmmmm.
 
Mine actually messed up today for the first time ever. It kept putting the caller on speaker and then even tried to FaceTime. It was so annoying. I think it was because of the case I was using. I threw the new case on today, and then problem also occurred today. I'll see if this happens again while I'm using my old case.
 
Updating will fix your problems! Potentially.

I'm on the latest OS and still get the problem from time to time. Never had a problem with the 3G or 2G phones. I don't make a lot of calls so I don't experience it too much... but it is still there (better then it was in previous versions).
 
My previous iphone 4 (which was a replacement of the original phone due to a data issue which was the carrier's fault in my area, but which they took over 6 weeks to fix), suffered from proximity sensor issues when updated from 4.1 to 4.2.1. Unfortunately I could not revert to 4.1. I struggled with the issue for a month, posting several times in the megathread on the apple discussion boards.

I finally gave up and went to the Apple store and they checked the serial number and advised that it was within range. However, my phone I am probably certain was a refurbished one (nothing wrong with that) and its refurbishment date was late December. With refurbishing, I know the back and front are replaced but I do not know if the sensor itself is replaced. With this phone I had the problem- putting person on speakerphone - about every 4th call.

My replacement phone - I am pretty sure as well a refurbished one - was manufactured in the 8th week of 2011, late enough one would think to have had the manufacturing/component issues of the proximity sensor sorted out.

Not the case and I still have the issue but less frequently. I can go 10 calls in a row and not have the problem and then it will bite me. It is always the speakerphone being activated.

It is such a crapshoot with these phones that I doubt I am going to go to the Apple store again. My screen is good, no overly yellow tinge, no flash issues etc. I am concerned that exchanging this phone may result in my getting a phone with either the same issue or different issues.
 
I have a problem with mine and not sure what to do but if I put a call in speaker mode and then take it off of speaker to put back to my ear the screen doesn't black out.

This happens all the time and has gotten to be frustrating at times when I am speaking with someone.

Oh, and I am completely stock iphone 4 with the latest firmware 4.3.2
 
Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_2 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8H7 Safari/6533.18.5)

My phone still has the issues. If I know it's going to be a longer call, I'll just press the home button, slide over to to the search menu, and hide the keyboard so that I can't press anything
 
I've had the issue since day 1. Pretty much anytime I try to hold it between my face and shouder (like if I need to type something or grab a piece of paper and a pen) it will put the person on mute, speaker or try to initiate FaceTime 80% of the time.

None of the software updates helped. I pretty much accepted it as a defect of the phone. It's a PITA sometimes, especially considering none of the previous models had this problem, but after 10 months I've learned to live with it.
 
This is one of the main reasons why I ditched my iPhone 4. I had it replaced for the proximity sensor issue once, even after upgrading the OS. Also, not being able to make a call inside my house really pissed me off. I loved my 3GS and it never had those issues. I'm currently sporting a Samsung Captivate. No proximity sensor problems and I can make a call in my house just fine. I do miss my iPhone 3GS. Hopefully the iPhone 5 will bring the iPhone back to that quality.
 
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