Source: Tribune research The Salt Lake Tribune

Original iPhone

Release • June 29, 2007Original features • EDGE connectivity for data, 2-megapixel rear camera for pictures only, touchscreen interface, Web-based apps.

iPhone 3G

Release • July 11, 2008New features • 3G connectivity for data, GPS receiver, white model added, native apps available through iTunes App Store.

iPhone 3GS

Release • June 8, 2009New features • 32-GB model added, faster processor, system RAM doubled, digital compass, native voice control, 3-megapixel rear camera, video recording added.

iPhone 4

Release • June 7, 2010New features • Case redesign, high-resolution Retina display, faster proces-sor, system RAM doubled, CDMA-band model added for CDMA-based networks such as Verizon, rear LED �ash adde 5-megapixel rear camera.

iPhone 4S

Release • October 14, 2011New features • Processor changed from single- to dual-core, Siri voice assistant, 8-megapixel rear camera, 1080p high-de�nition video recording.

iPhone 5 (tentative name)Release • September 2012Rumored features • Larger screen size with di�erent aspect ratio, faster processor, slightly di�erent case design, 4G LTE connectivity for data, di�erent dock connector.

iPhone’s progressionThe iPhone has gone through five versions since it debuted in the summer of 2007, and each time new features have been added. Here are the notable changes made with each new iteration.