Leaked internal document reveals that some iPhone models will no longer get support from Apple62
The iPhone models that are covered by the memo are the Apple iPhone 3G, Apple iPhone 3G (China), Apple iPhone 3GS, and Apple iPhone 3GS (China). The original Apple iPhone, which was already labeled "obsolete" in most countries, will no longer have the vintage status in the U.S.
The phones that are now vintage will no longer receive service or repair support at Apple Stores or at locations belonging to authorized Apple resellers. Apple normally provides support for devices for five years after it is no longer manufactured by the company. As we noted, in some states and countries, Apple is legally required to continue support for more than half a decade.
A precise definition of "Vintage" and "Obsolete" can be found on Apple's website. According to the manufacturer, "Vintage products are those that have not been manufactured for more than five and less than seven...Obsolete products are those that were discontinued more than seven years ago." The iPhone was launched in June 2007, the iPhone 3G hit the market in July 2008 and the iPhone 3GS was released on June 19th 2009.
source: Apple via 9to5Mac, RedmondPie