Callers say my voice sounds muffled when using bluetooth.

I updated my iphone and so far so good

Jason, thats what Apple has told us. Personally I've noticed incoming bluetooth call quality has increased. Might be a fluke, but so far so good.

Whotard: So you think the 4.0.1 update HAS helped improve bluetooth quality on your iP4?

Can you be more specific as to whether it has improved quality for you, your listener, or both? I have no issues hearing people (except for lots of pops & clicks) but when I turn my head away from the phone, they are no longer able to hear me.

I haven't yet done the 4.0.1 update as I'm waiting to see if it breaks anything else....

I've had my iphone for nearly a month. After approximately a week of use everyone I talked with on the phone began complaining that I sounded muffled or digitized. On my side the sound quality was fine.

I have five headsets and all of them experience the same problems.
- Jawbone Icon
- Jawbone Prime
- Plantronics Voyager
- BlueAnt Z9
- BlueAnt Z9i
- BlueAnt Q1

Resetting the phone does not help. I went to the Apple store and got a service replacement, again the Bluetooth worked fine for nearly a week and then everyone I spoke with began complaining again. In addition to the voice problems I also have begun having problems with reception/range and intermittent disconnect/connects with the headsets. These are the exact symptoms I experienced with the original phone.

I use my Bluetooth headsets 2-5 hours a day minimum so I'm probably considered a heavy user. The problem acts like the bluetooth hardware in the phone begins to fail after heavy use.

This problem is making it nearly impossible for me to use this phone for work since I need my hands free and must use bluetooth.

I have a 2010 Toyota Highlander with Blu Logic (Toyota after market Blue-Tooth). Experiencing the same muffled voice complaint from people that I call

I'm having the same issues as well, I too have a Motorola H710 that worked just fine with my blackberry prior to me purchasing the iphone 4. Its a intermitting problem but it happens enough thats its really getting under my skin. Everyone is saying that I sound muffled, robot-ish... I hope apple fixes this problem asap!!!

Yes and it's not just jawbones issues with my icon so I bought another blueant it has connection problems and periodic sound quality issues talk to an AT&T rep he said he had not heard any complaints. This is truly annoying and costly I also tried a motorola h15 and jawbone ll

no go

What sort of user error would account for a headset which works fin with a iPhone 3G and muffled to the point of unusability on the iPhone4? Actually, I don;t know if it is iPhone 4 or iOS 4 related, but there is definately a technical problem.

It may have been less than ideal and certainly every user has a different threshold for satisfaction with voice quality. But the problem is much worse with the iPhone 4 or iOS4 (I'm not sure which is actually the problem. The problem also may differe depending on bluetooth headset model.

I have a theory that the iOS 4 software has a glitch that sometimes doesn't disengage the noise cancellation microphone (top of unit near headphone jack) when on Bluetooth, therefore it interprets your voice as "noise" and tries to cancel it.

In fact, I'm pretty sure that's what is happening. I'd bet money. Unfortunately, Apple drags their feet on a fix, just like proximitygate.

I reported experiencing both conditions during a call to Apple Care today. DO YOUR PART, REPORT IT.

I've done some tests with my iPhone 4 and a Motorola H17 and there is a moderate degradation in quality on the other end of the call. It sounds low bandwidth with digital noise (fuzzy sounding) and almost no fidelity (no "T's" or "S's" come through). This is a serious step down from the 3Gs using the same exact headset.

On the other hand, the headset volume on my end is very loud, much louder than it ever was on the 3Gs.

This is my theory as well, something about noise cancelling is turning on when it shouldn't.