Is AT&T's network problem partly the fault of the iPhone's radio?This article contains unofficial information.
One person explained why European networks are not having the problems seen by AT&T and O2. His reply was that because signaling channels are used for Text messages and data, and because Europeans were heavily into both way before the U.S., the overseas pipelines are built up and can better withstand all of the traffic. A solution to the problem would be to utilize equipment that would be configured to dynamically handle signaling traffic and shift more spectrum to signaling channels when needed. AT&T said it will be adding 2,000 cell towers this year and has already started making other improvements to its infrastructure. O2 is requesting that its vendors configure equipment to handle the increased need to move data
Even with all this traffic, AT&T is confident that it can handle the ever increasing number of iPhones and the new iPad when that device comes online later this year. Apple COO Tim Cook says about AT&T's goal to fix its network, "We have personally reviewed these plans and we have very highconfidence that they will make significant progress towards fixingthem."
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source: arstechnica via iclarified, EngadgetMobile