iPhone was released in the USA on 29 June 2007. At that time, 2 models of the iPhone were released. The difference between the two models was in the internal storage and the price. The 4 GB model was priced at $499 and the 8 GB model was priced at $599. Tens of thousands of people waited days before the launch for the iPhone in front of the AT&T and Apple retail stores for buying the iPhone. Matter of fact, lots of stores reported stock shortage within half an hour of the release.