AT&T Underestimated iPhone 3G Success

If in France we could blame Orange for having locked the data transfer speed for iPhone 3G owners for a short period of time, in USA, most iPhone owners could not get a call and/or send/receive any data from their device.
John Donovan, an exec from AT&T, admitted that the company underestimated the success of the iPhone and were pushed to react in emergency to upgrade their technical infrastructure. This was especially the case in large cities and for university campus.
If some carriers considered the iPhone as a "must have" device, then as the best way to attract new customers, they now realize that it will require massive investment in technical infrastructure for allowing data transfer linked to the way iPhone owners are now using their mobile phone and data transfer ability