iPhone 4/iOS 4 bluetooth muffled on other end

I was having problems-both with the headset losing connection and muffled audio on the far end. Deleted the headset pairing and then re-paired the headset and this fixed both problems. Tested with an incoming and outgoing call, no problems.

Guys we have try hard to get our voice heard!
In addition to file bug to Apple, we need to get more press coverage on this.
So far, we only have one from http://www.notebooks.com/2010/07/14/iphone-4-bluetooth-problems/

I think that we each owe each other by sending tips to Consumerist/enGadget/Gizmodo and more.

Thanks

TUAW covered it today:
http://www.tuaw.com/2010/07/13/iphone-4-bluetooth-issues-reported/

We need more. This is not enough until Apple shows any sign of taking actions to address this.

From TUAW & NoteBooks.com, it seems that headset provider is working with Apple & AT&T on this, but that's only one sided story. We need to hear what Apple has to say on this.

Same issue here with Plantronics Voyager 520. Terrible sound quality. Same exact headset was great with 3GS on iOS3.

Let's hope it's not a hardware issue, and that a fix is coming VERY soon. Can't afford to buy a different headset and it's clearly Apple's problem.

Still having the bluetooth issues with iOS4. But since I'm also having the proximity issues too, it makes my iPhone 4 almost impossible to use as a phone.

So both of our iPhone 4's are being sent back to AT&T tomorrow. I downgraded my 3G back to 3.1.3 last night. And of course, the bluetooth works perfectly. I hate that I'm gonna be missing all the cool new feature, but at least I can actually make phone calls.

I just hope they get this problem fixed soon, so I can repurchase them. I have always bought my iPhones on launch day ever since 2007. But I will now be taking a "wait and see" approach from now on when they release a new phone.

I finally got around to pairing my car BT speaker to my Iphone 4. I have a Jabra SP700 and so far I'm not having the muffled sound problem with it. still having it with my Motorola H17 headset though. 😟

I just got an email that they released the beta of iOS 4.1 - I will test it out tonight and let you all know tomorrow if it fixes this issue - keep your fingers crossed that it does!

I think that the bluetooth problem effects only people that upgraded their iPhones, is it true? there's any one in here that did not upgrade?

Anyway, I think that I found a solution, I'll use my iPhone for a day and post the solution once I see that it works.

Similar problem here... old BT headset was working fine (with 2G phone). As soon as I activate the new iPhone4, the BT headset is squirrly (it was one of the Apple-made BT headsets): occasional static; occasional TERRIBLE warbling; dropped calls.

So, I go and buy a new Aliph Jawbone Icon headset (at the Apple store); while it sounds OK from my end, nearly a dozen of my callers have complained that: (a) I sound like I'm at the bottom of a well; (b) I sound muffled; or (c) they can't understand me.

Call clarity withOUT the BT headset (either of them) is fine; call clarity with a cable-connected headset also is fine.

So, seems to me that it's a problem with the iPhone4 (and/or with iOS4).

I'm going to return the Jawbone headset, and wait for Apple to fix things (software I hope; increasing discussion online today about possible phone recall). Then, maybe I'll buy one.

I did not upgrade. I have the "muffled" problem.

Just got my new iPhone 4 two days ago, and I'm also experiencing this issue with my bluetooth (Plantronics 925).

Does Apple realize that this is a safety issue as it affects a huge number of automobile drivers?

CoolGeex, not true. It affects iPhone4 (which I haven't upgraded from anything :-p)

Both Plantronics Discovery 925 & Jawbone ICON are affected. If you have a solution, definitely share. (hopefully, it does not involve downgrade to iPhone OS3)

Both Plantronics Discovery 925 & Jawbone ICON are affected. If you have a solution, definitely share. (hopefully, it does not involve downgrade to iPhone OS3)

Yeah, I have a couple of old cheap bluetooth devices that seem to work just fine so far. However, since my iPhone 4 is brand new, I've only made a couple calls on each device. Naturally, my most expensive (and normally most clear) device doesn't work...

There are reports that iOS4.0.1 just released.
http://www.engadget.com/2010/07/15/ios-4-0-1-hitting-iphones-right-this-second/

I am at work, so I can't try it until I get home... perhaps, people can give it a shot now and see if BT issue goes away and update this thread with their experience.

Thanks