An internal AT&T document related to the iPhone 3GS leaked to the public, and describe a successful story:
Best-ever sales day in our retail stores
Second-largest traffic day in our retail stores
Most transactions processed via our IT systems in a single day
Most upgrade eligibility checks in a single day
Largest order day in att.com history
Largest features sales day in att.com history
So, it once again demonstrates how Apple's product can drive customer's interests and become a useful but also popular device.
