iPhone 4/iOS 4 bluetooth muffled on other end

Been following this thread for a while, infuriated that I too, am experiencing this issue. I am a fairly new, but loyal Apple customer, on my second Mac and iPhone. Fix it Apple! I almost returned my iPhone 4 over this, proximity sensor issues, and reception issues, but finding a used 3GS to sustain me until Apple can get their crap together has not been successful, with me being on the road all the time.

Anyway, I just jailbroke my "new" phone today (Am I allowed to say that here?) and I couldn't help but wonder, would it be possible for a developer to write a Bluetooth stack that actually works? Or maybe someone already has???

Yes, I do have this problem with my iphone4. I have samsung blutooth headset, I can here the other person clearly but they complain about braking voice and disconnection.

I face the same problem too with a set bought in Singapore just a couple of weeks back at the initial launch. I have tried with two different noise cancellation bluetooth ear-pieces. Same muffled voice complain by other end problem.

Im not usually one to join the masses, and I can say that I have followed the bluetooth scene for some time trying attempting to use the bt530, the icon, the blueant q1, and the blueant t1, all had some tradeoff that made the product not worth using. The t1 was my latest ios4 attempt, and while I had high hopes and the product worked well, I would have occasions where things would go into a connect/disconnnect loop at random times, causing lots of problems. This week with a complete lack of faith I decided to give the Q2 a chance.... wow not only is the audio in and out great, but somehow they have the trick connection to ios4 figured out. Its a stellar product that delivers!!!

For those of you that listened to me and purchased the BlueantQ2 headset I know you are happy that you can use your Iphone 4 again with no Bluetooth issues.
I must say for then first time in 5 weeks I actually had an Apple store manager admit to me that there is Bluetooth issue with muffled sound issues with the Iphone 4 and the next major software update will fix this problem. He broke the code of silence!!!

The Q2 does NOT fix the problem. I have 2 Q2's and 2 iPhone 4's that have the muffled problem with the Q2. It only happens if I turn on the headset after a call is established but it consistently happens on both phones with both headsets.

Not trying to be that pessimistic, but you said "Apple Store Manager admits" Well, heck, I have been to Genius bar, and the Genius also admits the issue, so what good came out of it since then (that was early July)? Oh..right they fixed the graphics display of the antenna signal + higher priority to fix the PDF security hole.

We need a confirmation from their engineering team that they are truly working on this. And whatever happened to SJObs' famous one liner? It would be awesome if he just says "We are on it." or something like that...

Being an early adopter, I know the risk, but I did not anticipate something so fundamental would have such a major regression.

Message was edited by: antonywu

It's okay to be a little pessimistic. Apple isn't managing this issue very well. However I did call apple support and they admitted the issue but had no anticipated resolution date. Rep did indicate that it's a software not hardware issue. Not sure I believe them but it would be helpful if they acknowledged the need to address the issue. I've also found no mention of a targeted solution in 4.1 betas. Apple's QA process could use some refocusing on the basics.

Yes, I have a Jawbone Icon and having the same problem. I boyfriend has the the same device however it is connected to a blackberry w/no problems. Have spoken to Apple support team regarding this problem and getting mix msg .... Don't think they have clue on how to fix the problem.

I have a 2010 Prius with factory installed Bluetooth. With my 3GS the audio was excellent. Callers often commented how clear I sounded. Since upgrading ($400) to the iPhone 4, every call is terrible. I can hear them well, but they tell me I sound muffled and am virtually impossible to understand. I've reported this thru the iphone feedback site. Please fix this Apple!!

BLUEANT Q2 is still working perfect! (Two weeks and 200 calls) Have not tried turning it on when getting incoming call to duplicate muffled problem...it has always been on. I really do like it though for everything else. So far No problems.

In my experience, it is not every iPhone 4 that has this problem. My wife and I both have iPhone 4s, both of us use identical B&O bluetooth headsets. We are both using the latest 4.02 software.

My phone works fine, with my voice equally audible through the B&O or through the handset, a little less clear on speaker. It also works fine when bluetooth connected to my car.

My wife's phone is pretty much always muffled when on the B&O or speakerphone.

We tried exchanging the B&O bluetooth devices, and nothing changed.

Apple replaced my wife's iPhone 4 yesterday, but the problem is still there. A power off/on sometimes makes things better (although this is, of course, not a remedy, just more data).

I suggest that you keep asking for replacement phones until you get one that works. It may be a software issue, but it seems that not all hardware is affected. Since a power off/on can temporarily make the problem go away, the fact that a new phone works in the store may not be the end of the story.

Most people using Bluetooth headsets leave them on their ear why don't you leave it on and you wont have a problem with your Blueant Q2 rather then turning it on when the phone rings its not meant to be used that way,it also has great battery life. You have that great feature when your phone rings just pick it up put it on your ear and say answer since the BlueantQ2 has voice activation. Please don't knock the headset it is the only one at the moment that is working perfect with the Iphone4. If you read the posts this headset is working perfect for everyone else so just use it the correct way and you will be fine I actually have 12 of Blueant Q2's with 12 Iphone 4 phone because I run a Limo company and all 12 are working perfect.

i have two Blueant Q2's and although they are MUCH better than any other headset i have, they are NOT perfect. i still have problems with them disconnecting and reconnecting sometimes as well as random muffled sound....but overall, yes, they will get me by until this "hopefully" gets resolved.

I think you hit the nail on the head. Well put!