Question: what are the different generations of iphones?
Answer: iPhone: June 29, 2007., iPhone 3G: July 11, 2008., iPhone 3GS: June 19, 2009., iPhone 4: June 24, 2010., iPhone 4S: October 14, 2011., iPhone 5: September 21, 2012., iPhone 5S & 5C: September 20, 2013., iPhone 6 & 6 Plus: September 19, 2014.