Our iPhones seem to work pretty well. Sure there are a few zones around town where there is no data and it does tend to hang every now and again. But, that is to be expected. Overall it is as stable as any desktop OS out there and when it does crash it comes back pretty quick. But maybe this isn't normal?
Apparently 2% of the iPhones out there got some bad software and need to get an upgrade.
According to a Macrumors forum member, Steve Jobs wrote: