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I tested all the demo iphones in the apple store at lakeside mall and they all have this problem. (5 bars -> 1 bar)
 
I haven't been able to replicate the antenna problems with my i4. I have held it in my left hand...moved my hand all over the left side, and don't see any change in the bars.
 
Yup ....I've been in denial all day but both mine and my wifes phone do it. Oh yeah they both have full cases on them and if you cover the corner of the phone they both drop to 1 bar or less. This is complete BS. I paid 600 bucks for two phones that actually make at&t service worse than it already was.:mad:
 
I'm not able to replicate the issue on my iphone 4. I've attempted at home and at work, in which I drive 30 minutes away. I would even say it is somewhat rural where I work and the reception isn't always the greatest, but have had no problems.

Has anyone tried to reinstall iOS4 to see if the problem continues?
 
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