When in a phone conversation in a 3G coverage area with 3G enabled in the setting the Iphone is not maintaining 3G connectivity during the call the 3g icon next to the bars and AT&T log are gone this seems to happen about 27 minutes into the call when I asked AT&T about it they suggested I reset my network setting and they noticed a problem on there end with a tower in my area and issued support ticket, I called Apple tech support and they claimed to know nothing about it. Last night I did did a Google search on this and found out that CNET has already reported this to be a hardware Chipset problem and radio stack problem
here is the url. News | iLounge
here is the url. News | iLounge