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Ok, on my iP4 (16GB on 02-UK) I can only recreate the fault if 3G is turned on. If 3G is on, the signal bars will drop until I have just an EDGE (o) signal available. The signal bars will then increase back to normal even with my finger in place.

I turned off 3G and held my finger over the joint and nothing happened.

I repeated this several times. I'm now going to test it on my iPhone 3G on OS4 and hopefully prove this to be a software fault and not a balls up with the 3G antenna on the phone.

Anyone else with the issue, turn 3G off and try and recreate it please..i'd be interested to see if you have the same findings...
On my 3G w/ iOS4, I disabled 3G as you requested and recreated the problem by cupping the phone in my hand. It took longer to fall all the way down to "Searching..." while on EDGE, but it did in fact eventually lose carrier.

As a control, I borrowed a co-worker's 3G still running the v3.1.3 firmware. While holding his phone in the same way that I can replicate the problem with my iOS4 3G, there is a signal strength decrease (goes from 4 bars to 2) but his phone does not completely lose carrier like mine does.

Now I'll be the first to admit that this is hardly a conclusive, definitive test of the problem. But it sure does seem to be a bug introduced with iOS 4 rather than a hardware-only problem. It's entirely possible (if not probable) that the exposed antennae on the i4 exacerbate the problem, but my observations strongly suggest a software bug being a significant contributing factor.
 
On my 3G w/ iOS4, I disabled 3G as you requested and recreated the problem by cupping the phone in my hand. It took longer to fall all the way down to "Searching..." while on EDGE, but it did in fact eventually lose carrier.

As a control, I borrowed a co-worker's 3G still running the v3.1.3 firmware. While holding his phone in the same way that I can replicate the problem with my iOS4 3G, there is a signal strength decrease (goes from 4 bars to 2) but his phone does not completely lose carrier like mine does.

i can confirm iPhone 2g running ios3 drops but does not completely drop like you stated.
 
WiFi on, held my left hand in an "L" shape across the bottom, corner, and left side. Signal barely dropped one bar. Doesn't seem like much of an issue to me. The radio in this model certainly seems strong enough for me, and even without the bumper, my phone just doesn't exhibit it.
 
Add me to the list of people with the "left handed" reception problem. I've tested it out in several locations and have seen the bars drop with different speeds so I think it partially has something to do with signal strength to begin with. Im 50/50 on whether this is a software problem or something to do with hardware. Just waiting on Apple to issue a statement regarding this!
 
Damn, I'm screwed.

You 'marathoners' have a chance..

There is still hope for you. Just wear this while touching the iphone 4:
271031_xy5vwQhK45tXJ38jLM4Pxq0tZ.jpg_%28JPEG_Image%2C_640x480_pixels%29-20100624-134115.jpg
 
On my 3G w/ iOS4, I disabled 3G as you requested and recreated the problem by cupping the phone in my hand. It took longer to fall all the way down to "Searching..." while on EDGE, but it did in fact eventually lose carrier.

As a control, I borrowed a co-worker's 3G still running the v3.1.3 firmware. While holding his phone in the same way that I can replicate the problem with my iOS4 3G, there is a signal strength decrease (goes from 4 bars to 2) but his phone does not completely lose carrier like mine does.

Now I'll be the first to admit that this is hardly a conclusive, definitive test of the problem. But it sure does seem to be a bug introduced with iOS 4 rather than a hardware-only problem. It's entirely possible (if not probable) that the exposed antennae on the i4 exacerbate the problem, but my observations strongly suggest a software bug being a significant contributing factor.

I await the new AT&T commercial showing you it was never their fault.
 
So I called Apple and the tech support guy said this was the first time he's heard of it and said his supervisor has been using it all day without problems. Didn't want to do anything about it.
 
Give Apple a little time to investigate

So I called Apple and the tech support guy said this was the first time he's heard of it and said his supervisor has been using it all day without problems. Didn't want to do anything about it.

Give it a week or two. I expect Apple will be addressing this soon. They probably want to have an answer before they say anything.

FYI this doesn't occur on my new iPhone 4 with a bumper. No yellowing, either.

Ron
 
I called apple tech support to tell them I had this problem. They told me it was AT&T having network problems because of the new phone.

How funny, these Apple guys will say anything to avoid taking responsibility for their poorly engineered phone.

Apparently Apples decided since they are so popular, that testing is no longer needed. Quality control?

What quality control... You actually want an iPhone that works? :rolleyes:

This video shows how easy it is to duplicate the problem.

http://www.appleinsider.com/article...its_lose_signal_when_held_with_left_hand.html
 
I've tested it out in several locations and have seen the bars drop with different speeds so I think it partially has something to do with signal strength to begin with.

Too bad it's the phone.

I have a 3G BlackBerry Bold, and my iPhone 4, both on AT&T.

When I call from my office which is in a weak signal area, the BlackBerry stays connected, with a very clear call and good voice tone. With the iPhone it initiates, then drops the call. At first I thought my newly acquired bumper would make it better, but that does not. I only prevents a problem in a strong signal area.
 
A marvel of engineering!

How funny, these Apple guys will say anything to avoid taking responsibility for their poorly engineered phone.

Apparently Apples decided since they are so popular, that testing is no longer needed. Quality control?

What quality control... You actually want an iPhone that works? :rolleyes:

It's ridiculous to call this a 'poorly engineered phone'. By any standards it's an engineering marvel. To channel Lewis C.K.:
It's a video phone! That you hold in your hand! It's a 32 GB computer! That you hold in your hand!

It sounds like there may be a problem with the antenna design, but that doesn't make the phone 'poorly engineered'. (For the record, I can't reproduce this with my just-purchased iPhone 4.)

I can imagine how this got by quality control, though. All of these phones that were carried around by Apple employees had a case on them, and that seems to help or fix the problem.
 
yahoo and other news sites need to pick up on it, otherwise, apple will just ignore these issues.
 
FWIW...

I can partially reproduce this issue on my 3G. Sitting downstairs at home (on o2 uk 3G) I get 4 bars signal with phone on table in front of me. I pick it up and hold it and the 3G signal is lost completely and I go to 5 bars on 2G. This wasn't an issue before I upgraded to iOS4; in fact before that I had to go upstairs to get a 3G signal.

A software fix *might* help, but I'm holding off getting my new iPhone til we've had a statement from Apple [and o2 has more stock...!]. Shame as my wifi is f**ked and phone is OOS - I'd hoped that iOS4 might fix it... but that's a different story!
 
yahoo and other news sites need to pick up on it, otherwise, apple will just ignore these issues.

I agree - you can tip off engadget on their main page, I did so yesterday and I suggest everybody else does too, as we need some tech blogs on it, as well as people like CNN if we want a fast response from Apple.

Their communication has been exceptionally poor with the white iphone issues recently, and they're risking shooting themselves in the foot! The employees at my store were in until 4am this morning preparing and the ones who took over saw the phones for about 10 minutes before they had to get on with it. :rolleyes:
 
You guys need to e-mail the tech journalists at WSJ, Bloomberg, NYT, Marketwatch, CNBC, etc. I did this today but they don't seem to care unless there's a clear critical mass of people doing so.
 
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