updated 07:45 pm EDT, Wed April 14, 2010
Apple officially restricts functionality to 3GS
A YouTube video appears to show a jailbroken iPhone 3G running the v4.0 firmware, with the full set of features including multitasking. Apple officially restricts multitasking functionality to the latest-generation iPod touch and iPhone 3GS, which has lead to criticism from owners of earlier devices with slower processors and limited RAM.
The limitation has been blamed on hardware specs, although the YouTube video indicates that Apple's decision may have been based on a quality-of-experience rationale rather than technical aspects. The host of the video does not show heavy multitasking, although the host claims that the feature works well on the iPhone 3G.
The official iPhone 4.0 firmware is expected to launch sometime this summer, while the iPad update will wait until the fall.