worldwide sales

What Are All The IPhones In Order? 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. Which is the best