IPhone 4 Bluetooth Issues

My wife and I both have iPhone 4 with two different headsets (mine Jawbone ICON, hers Plantronics Voyager PRO) with same problems as reported here. I performed the recommended resets of the iPhone and headset but no fix. Sound quality is poor when call is received, but it seems to be okay if call is initiated. Seems to point to a firmware issue that Apple has to sort out.

What's the fastest way to get Apple's attention for this issue?

I am having the exact same problem as you. Do you think we could exchange our phones for new ones, because of this bluetooth issue?

I also have the 3gs and the iphone4. and downloaded the latest update 4.0.1 My head sets are the backbeat 903 and the jawbone. they both worked well with the 3gs, but when paired with the iphone4 all he.. broke loose. constant disconnects, constant beeping as if losing signal which is very annoying and all this while the phone is in my shirt pocket w/Apples renown bumper. People tell me i sound distant and muffled and there appears to be a delay with the connection, this is with both BT's. When I listen to movies, music thru my backbeat, it fades in and out like a skipping record. What is going on Mr. Jobs? Has Apple sacrificed and forsaken Us? And stole our money to get us tied into a new two year contract with AT&T with an inferior product before baling out with there product to VERIZON. Signal problems, antenna problems, what's next......

Ok, so here is my so called solution to the BT problem with my H17.

Background: I have had 2 new iphone 4 (they replaced the first one for me).
I have tried 2 brand new Motorola H17 and a Jawbone Noise Assassin (new in summer of 2009).

Problem: I can hear loud and clear, but reports from other end is very muffled, sound like I'm far away in a tunnel, can't understand anything you're saying, etc.

I tried resetting network, resetting settings, etc...

Sometimes it would work great and people said wow you sounds great. Sometimes report the opposite as listed above.

Here's the deal:

If I start the call - either initiate the call, or receive a call, with the BT on and connected to the phone, it sounds like ****.

If I start or receive a call while on the actual phone, and with the BT OFF - then, once the call has been connected, THEN turn on the BT and go to BT, everything is great.

I have tested this all day, and definitely, 100% of the time, I get the same results.

Would be really interesting if you guys experiencing problems could replicate these results...

Update: Still having same problems with bluetooth cutting-out. I can get it to cut out just by holding it near my hip. Also, some call recipients complain my voice is very muffled and I need to disconnect.

Problems here too. Erased the phone, feed everything in piece by piece, still MUFFLED! If that makes my clients uncomfortable, that will alienate them.

My experience, for the record:
Callers complain of muffled sound and can't understand me, often but intermediate; bluetooth connection drops in 5' to 10' proximity or less, intermediate; calls drop often, often during a call there is an interrupting sound as if the connection drops with a strong initial static sound, then fading back to the phone call -- experiencing that frequently.

Other than that, I really like the phone. I want it fixed, I'd prefer to keep the phone.

I have a 3G with OS4 and it can't find the bluetooth. The phone will search for it then goes back to off. I have the sync system in my car and anyone that has bluetooth and are not running OS4 works fine.

I've been on the phone with Apple tech support and Plantronics tech support for several hours. I'm using the Plantronics Discovery 925, which worked flawlessly on the iPhone 1 for two years. Experiencing the same issues as most of you on the iPhone 4, muffled, reduced range, etc. Basically useless.

Jumped through hoops for both support teams with no luck.

The Plantronics team told me that they haven't received any complaints, which can't be true, but they are going to research it and get back to me. Apple has officially told be to buy a new bluetooth headset. No resolution in sight.

Just recently made a discovery for Plantronics Voyager Pro users: when you receive an incoming call while the phone is paired with the Voyager device, no NOT answer the phone by removing the auto-lock. That will transfer the conversation to the iPhone and away from the Voyager headset. Instead, just press the button on the Voyager to answer the call and you will not lose the bluetooth pairing. The sound quality (both ways)is still below average, but at least I am avoiding one kind of mistake.

Update: Thanks Apple! The Apple Genius replaced my iPhone4 two days ago and this one works fine! No more Bluetooth problems.

Thanks Apple! The Apple Genius replaced my iPhone4 two days ago, and it looks like everything is better.

I am having the same issue with Apple iphone 4 and my Plantronics Voyager Pro when I had the 3GS this was not an issue. I attempted to download the latest update unable to do so using Windows XP. We have been sold a piece of junk. My callers complain of muffled voices, they cannot hear me and every 20-30 minutes the headset just disconnects on its own for no apparent reason. I am still well within the 30 day warranty and contemplating returning 4 for the 3GS.
Technical Support is now flooded with so many calls good luck getting assistance. I even went to the retail store exchanged out the headset for another replacement one and the same issue again. If anyone has a fix let me know this is frustrating.

Have ip4. Had ip3. Ip3 worked great. Use for work to call, set my appointments for next day. My clients hate-HATE- new phone, ip4-- I use to be able to make calls with a headset, I miss this feature. I use to be able to use headset and walk in other room---I miss that alot too. -- not gizmo person, hate idea of switching phone-- did it anyway, miss my old phone, miss my trust in Apple. -- now, settle for ip4, hope Apple fix's what is not effective for me, because I'm scared to switch back and lose what I've invested at this point! (not just $, but my time as well)...or return my new boat anchor..

My in-car bluetooth worked great with my old iPhone 3G and my wife's 3GS. I got the iPhone 4 and it no longer works properly. My wife's 3GS on old firmware still works great, so it's the IOS 4 that's the problem, period.

Partial list of problems:

Doesn't always automatically pair

Outgoing calls work well once paired - at least most of the time

Incoming calls do not pass through to the car system, and if I try to switch over after calling, it switches over, but no sound comes out of the car system.

The last one is most irritating, since an incoming call should mute my car stereo, lower the a/c fan speed, ring through the system and display the caller ID. Instead, I get nothing. As it now stands, I often can't hear my phone if its in my pocket and the stereo is on, so I miss the call.

Same here - had IP3 & BT worked fine. IP4 with 4.0 or 4.01 is pathetic! Wont pair with my Samsung laptop or my Audi in-car BT.

Searching display on phone just cycles forever. No difference if Wifi on or off. Samsung sees phone but cannot pair. Audi sometimes pairs but then drops the connection after a minute or so - have to go through "find new phone" routine to re-connect.

Vodafone just swapped my phone & unfortunately I have exactly the same symptoms on the new one....

This need sorting URGENTLY - its illegal to drive with hand-held phones in the UK