In this video, an iPhone 4 owner demonstrates how the antenna problem also affects transmission in voice calls. Using only one finger, the voice quality degrades, even dropping completely. He explains the process:
Demonstration of the new iPhone 4 showing problems with TRANSMISSION as well as reception. Note the substantial signal degradation (and subsequent audio dropout) at 2:45-2:50 and 2:58-3:01. By simply MOVING MY FINGER along the side of the iPhone, I can get the call to drop signal and audio!!
The effect his finger has when moved across the seam is undeniable. Mike argues that the problem may be related to a design flaw that affects all phone, or to a batch of units. [YouTube]
It’s funny how Steve Jobs show us how to holding the right way… here’s some funny photos…