I also can't believe the responses this thread has gotten. The OP just wants people to test so we can see if the issue can be actually isolated to individual phones or if actually it does affect them all.
If someone shows two iPhone 4's next to each other, one having issues and another not having issues it proves that it doesn't affect all iPhone 4's. Otherwise, it's plausible that all iPhone 4's are effected when used in certain areas. There has so far been not 1 single piece of evidence to suggest that some iPhones work while others don't. This would prove that.
If anyone can provide such a video we'll be able to have a much better understanding of the situation.
If someone shows two iPhone 4's next to each other, one having issues and another not having issues it proves that it doesn't affect all iPhone 4's. Otherwise, it's plausible that all iPhone 4's are effected when used in certain areas. There has so far been not 1 single piece of evidence to suggest that some iPhones work while others don't. This would prove that.
If anyone can provide such a video we'll be able to have a much better understanding of the situation.