SRI International
In December 2007, SRI launched a spin-off company, Siri Inc., which Apple acquired in April 2010. In October 2011, Apple announced the Siri personal assistant as an integrated feature of the Apple iPhone 4S. Siri's technology was born from SRI's work on the DARPA-funded CALO project, described by SRI as the largest artificial intelligence project ever launched. Siri was co-founded in December 2007 by Dag Kittlaus (CEO), Adam Cheyer (vice president, engineering), and Tom Gruber (CTO/vice president, design), together with Norman Winarsky (vice president of SRI Ventures). Investors included Menlo Ventures and Morgenthaler Ventures.
Apple Inc.
At the Worldwide Developers Conference (WWDC) on June 7, 2010, Apple announced the redesigned iPhone 4. It featured a 960 × 640 display, the Apple A4 processor, a gyroscope for enhanced gaming, a 5MP camera with LED flash, front-facing VGA camera and FaceTime video calling. Shortly after its release, reception issues were discovered by consumers, due to the stainless steel band around the edge of the device, which also serves as the phone's cellular signal and Wi-Fi antenna. The issue was corrected by a "Bumper Case" distributed by Apple for free to all owners for a few months. In June 2011, Apple overtook Nokia to become the world's biggest smartphone maker by volume. On October 4, 2011, Apple unveiled the iPhone 4S, which was first released on October 14, 2011. It features the Apple A5 processor and Siri voice assistant technology, the latter of which Apple had acquired in 2010. It also features an updated 8MP camera with new optics. Apple began a new accessibility feature, Made for iPhone Hearing Aids with the iPhone 4S. Made for iPhone Hearing Aids feature Live Listen, it can help the user hear a conversation in a noisy room or hear someone speaking across the room. Apple sold 4million iPhone 4S phones in the first three days of availability.