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Two theories...

1) We know the number of bars is not a precise measure of signal strength. Let's say, for sake of this discussion, that each bar represents 100mV of RF energy received, so 5 bars = 500mV. Person #1 has great reception and is actually getting 700 mV and shows 5 bars. He touches the antennas and drops by 200mV to 500mV, still 5 bars. Person #2 is barely getting 500mV and sees 5 bars. He touches the phone, drops the same 200mV as person #1, but now sees 3 bars (300mV). This could explain why some see the issue and some don't.

2) We know that Apple is trying to do some more sophisticated GSM signal management in iOS4. I believe I also read there may be a software bug in the display of signal strength. So, let's say the bar display is messed up and the perceived loss of signal is not real. BUT, when the false signal display drops to "no service", iOS thinks the signal is gone and disconnects your call. This could explain why dropped calls are being seen, even if it is just a firmware bug.

Yep. That and people not doing any REAL field tests with more careful controls etc. We just have to wait and see what Apple says in their defense. Best case scenario is the signal issues are fixed with an OS update (or even a baseband update), and the yellow screen spots issue is only present in around 0.5% of all devices.
 
A cell phone receives its best possible reception when perfectly still.
This has always been true of all cell phones.
I'm going to keep posting this because there's a number of stubborn, um... "scientists" out there that are missing their fallacy. Where is your control? That's not science. Get a clue and ****. (message repeats)

while there are definitely people out there that are really taking it too far, there is no question that this is a prevalent thing (whether it's actually affecting signal quality or not) from what has been seen online. on my 3GS, I had max bars the majority of the time, even when I touched it.

Now, the question is whether or not this is just a software bug. I personally believe it may be a software bug because even when all of my bars disappear, I can still load web pages and stuff just fine. I just wish Apple would come out and say something for the record to prevent any further confusion.
 
I'm sure this has been said....

This happened to me on every phone I've got when I first activate. It even did it today. After an hour or so, it was fine.

No problems since. It seems normal to me.
 
Two theories...

1) We know the number of bars is not a precise measure of signal strength. Let's say, for sake of this discussion, that each bar represents 100mV of RF energy received, so 5 bars = 500mV. Person #1 has great reception and is actually getting 700 mV and shows 5 bars. He touches the antennas and drops by 200mV to 500mV, still 5 bars. Person #2 is barely getting 500mV and sees 5 bars. He touches the phone, drops the same 200mV as person #1, but now sees 3 bars (300mV). This could explain why some see the issue and some don't.

2) We know that Apple is trying to do some more sophisticated GSM signal management in iOS4. I believe I also read there may be a software bug in the display of signal strength. So, let's say the bar display is messed up and the perceived loss of signal is not real. BUT, when the false signal display drops to "no service", iOS thinks the signal is gone and disconnects your call. This could explain why dropped calls are being seen, even if it is just a firmware bug.

These two explainations make the most sense. If this really is an issue I would expect Apple to release a software update within the next few days to fix the problem.
 
Wow that is weird my iphone 4 does the same thing. I have it sitting on the table and it has 5 bar then I pick it up and hold it and slowly the bars drop, but like others have said it still makes calls and safari still loads quickly.
 
Actually would it not be a sign of a superior built network? One that can relay in instant time how close or tight someone is holding their phone and then decrease the signal on the fly?

That is some pretty amazing technology, and clearly you are not forward thinking enough to see what this means for the future of the world!

Imagine a glass that starts to quickly evaporate your drink when you pick up the glass?

What about a book where pages disappear while you read it?

Can you not see what a time saver this kind of stealth technology will be?


LOL!!! Love it!!! :)
 
I do like Apple products, but I also like Android and own a Windows laptop along with my iMac so I would not call myself a blind fanboy. I don't own an iPhone, but I do own other Apple products and for the most part they have been trouble free. I just can't believe that this phone would be released without proper field testing. Even if it is just a software issue I can't see how it would have passed testing.

I own a Droid and it has excellent reception. Part of that is because I am on the Verizon network and the other is Motorola phones are known for strong radios and good antennas. They just have more experience when it comes reception in general. I think you have to cut Apple some slack. They are still pretty new to the phone business when you really step back and look at it. If AT&T was a stronger network this probably would not be an issue. You rarely see reception problems on Verizon phones no matter the brand.

It sounds like you may in fact have a faulty phone and a few others here might as well. If it is not working right then take it back and get a new one. I think a lot of people on here fall into the "me too" catagory. They see someone having an issue and then imagine they have one too. If there is an issue then it would have to be software related. There is just NO way Apple would have let hardware with a fault this large make it to production.

Just relax and enjoy your amazing new iPhone.

The problem is, I can't enjoy something that doesn't work properly. Not only that but I can't replace it because the stores are going to be sold out. How can I possibly exchange this non-working phone, if they don't have any phones to exchange with? It really seems like I am going to be out of a phone for the next month while they get their supplies in check.
 
Return Policy

Anyone know Apple's return policy if the phone I get tomorrow is truly a lemon? If I sign up for 2 more years with ATT I imagine I cant get out of that, which sucks.
 
The funny thing is that nobody noticed that when Steve Jobs was doing his presentation?? The 3GS opened the page and the iPhone 4 was struggling... on the same network. I suspected right then and there the iPhone 4 had reception issues... now it's confirmed. I guess we'll have to wait for iPhone 5.:(
 
Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A293 Safari/6531.22.7)

Jon1323 said:
Wow that is weird my iphone 4 does the same thing. I have it sitting on the table and it has 5 bar then I pick it up and hold it and slowly the bars drop, but like others have said it still makes calls and safari still loads quickly.

When it gets to "No Service", mine will not launch a call....
 
I don't have an iPhone 4 but I keep racking my brain trying to figure out how Apple would miss this in field testing. Then I thought of something.

The leaked iPhone 4 was in a "3GS style case". If all the field testers kept them in cases, wouldn't they have not even noticed this problem seeing as their hand would not be actually making contact with the metal?

If thats the case, I guess Apple's secrecy is biting them in the a** now.
 
Anyone know Apple's return policy if the phone I get tomorrow is truly a lemon? If I sign up for 2 more years with ATT I imagine I cant get out of that, which sucks.

Apple will exchange the phone no problem, or even give a refund.
As to ATT, forget it, no refunds as far as I know. You are stuck for 2 years.
 
My phone doesn't have this issue

Tried to reproduce the results in all the videos. . . and I can't.

Tried holding it the same way as in the videos, touching both the side and bottom antenna, etc. No difference in reception, at least in the bar scale.

Perhaps there is a very specific/intense way of holding it to require this? Or perhaps the issue is not as prevalent from one phone to the next?

Either way, it doesn't look like it will be an issue for my phone (32GB).

*Shrug.*
 
I am a Certified Apple Pro / Tech... The 2 iPhone 4's i received today lose the AT&T signal when phone(s) are held in my hand. As soon as i lay them down on the table the signal returns.
Phone itself is awesome without a doubt, but we use the phones for work and disappearing phone signal strength when held in the hand not good...:apple:

Your an Apple certified tech and you just joined this site within the last 20 days and this is your first and only post?????? HAHAHAHAHAHAH :rolleyes:
 
i'm not overly surprised. you create three separate antennas on the case, each one is most likely "tuned" to the frequency range it's supposed to operate in, and you short them to each other in your hand and change their characteristic impedance. the body is a high resistance, but it just may have an affect.

This issue I can reproduce. I do not have the pee-stained lcd issues but I do have this antenna issue, however. But when it drops down to one bar being displayed, I don't lose my internet connection (while using 3G) nor do I lose the voice call. In fact, I have made calls while using 3G and surfing at the same time while having one bar and the connection is solid.

I did notice that when you hold BOTH antennas with your fingers (all five), it will cause a drop in signal meter display. If you hold with two fingers or hold only one of the antennas, the meter does not drop down.

I just threw an old incipio 3G cover over the iPhone 4. Problem solved (for now). It has no problems with the incipio case over the iPhone...

Perhap's the human contact with the antenna's are causing a break in the conductance of these antennas somehow?

It's possible. Every antenna you cover with a piece of flesh loses some signal. Happens to all phones.

Ya, I am thinking this might be a problem with the body's grounding or resonance interference with the stainless steal band acting as the antenna!

If I recall correctly, the right side is the portion dedicated to the cell network chips (Top UMTS or 3G, and bottom GSM or Edge), and since he was holding it with his left hand, he had 4 fingers interfering with that portion of the antenna. Perhaps depending on which hand you hold it with, and therefore which side your 4 fingers are on versus just your thumb, it will cause a problem when on the side of the antenna band that is dedicated to the cell chips. The other left portion is for Bluetooth, WIFI, and GPS.

Any thoughts people? I hope not! :( I'm left handed.
 

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Man, you guys are making a lot out of a well known issue that affects all cell phones. Obviously just because of the redesigned antenna people are more sensitive to such sensationalist journalism, like the crap Gizmodo and Engadget are known for.
 
The leaked iPhone 4 was in a "3GS style case". If all the field testers kept them in cases, wouldn't they have not even noticed this problem seeing as their hand would not be actually making contact with the metal?

If thats the case, I guess Apple's secrecy is biting them in the a** now.

That's actually a really good theory. Entirely plausible.
 
I don't have an iPhone 4 but I keep racking my brain trying to figure out how Apple would miss this in field testing. Then I thought of something.

The leaked iPhone 4 was in a "3GS style case". If all the field testers kept them in cases, wouldn't they have not even noticed this problem seeing as their hand would not be actually making contact with the metal?

If thats the case, I guess Apple's secrecy is biting them in the a** now.

The leaked iPhone 4 was exactly the same product that came to market.
 
Thank God!

Kind of kills the whole reason to have a cell phone :)

Finally, we can move on from all this craziness about reception... all cell phones have always done it... get a Bluetooth head set if it's an issue where you are.

You only drop a bar or two if you're moving around, but if that's all the cell available, then you'll get drop outs or dropped calls. What's absolutely hilarious is it's engrained in the common culture that when you can't get any cell, you run around like an idiot looking for better cell, when that alone is working against you.

If you have no bars, set your phone down. What I've had success at in remote places is setting the phone on the roof of a car, near the driver door (so I can stand on the frame)... and actually make the call using speaker. It sucks, but that's life... and it works sometimes when you'd otherwise be running around like an idiot trying to get cell that you can never get.

btw, informed Jason Chen, author of the fallacious junk science Gizmodo article alleging iPhone 4 has a reception problem... yeah, you know the one I'm talking about... I let him know all cell phones exhibit this behavior, always have... and he BANNED me from Gizmodo. ROFL. So if you have a few minutes to wait for Gizmodo's painful page loads, go ahead and register and post your experiences that what he is reporting is... very very old news. We knew this in 1982 (G1 cell phones the size of a car, the good old days).
 
My iPhone edge and iPhone 3G do not do this. Either does iPad

If I am holding my brand new iPhone 4 in my hands, over about 15 seconds 4-5 bars will drop to 1-2 bars.

When I put it on the table, after about 15 seconds it climbs back to 4-5 bars.

I will make a video tomorrow. Time for bed now
 
The problem is, I can't enjoy something that doesn't work properly. Not only that but I can't replace it because the stores are going to be sold out. How can I possibly exchange this non-working phone, if they don't have any phones to exchange with? It really seems like I am going to be out of a phone for the next month while they get their supplies in check.

I would assume they will hold back enough stock to be able to do exchanges. It would be bad business if they could not exchange it in a timely fashion.

If that doesn't work it is possible a software fix will come soon. Last if all else fails you might have to go back to your old phone for a little while provided you still have it. I am not sure, but you sounded pretty upset so I am just trying to provide a little encouragement.
 
My iPhone edge and iPhone 3G do not do this. Either does iPad

If I am holding my brand new iPhone 4 in my hands, over about 15 seconds 4-5 bars will drop to 1-2 bars.

When I put it on the table, after about 15 seconds it climbs back to 4-5 bars.

I will make a video tomorrow. Time for bed now

No need. We believe you. It's still irrelevant until someone does some controlled tests.
 
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