IPhone 5S Hong Kong, and Singapore. It was released in 25 additional countries on October 25, 2013, and in 12 countries on November 1, 2013. Indonesia was the last country to receive the iPhone 5S, on January 26, 2014. On September 19, 2014, the iPhone 5S was succeeded as Apple's flagship smartphone by the iPhone 6 and iPhone 6 Plus, but the older model remained available for purchase at a reduced price, while the 64GB version was discontinued. The gold edition of the iPhone 5S was discontinued on September 9, 2015, when Apple revealed the iPhone 6S and iPhone 6S Plus The
IPhone SMS was added in the 1.1.3 software update. Support for MMS was added in the 3.0 update, but not for the original first generation iPhone and not in the US until September 25, 2009. At WWDC 2007 on June 11, 2007, Apple announced that the iPhone would support third-party web applications using Ajax that share the look and feel of the iPhone interface. On October 17, 2007, Steve Jobs, in an open letter posted to Apple's "Hot News" weblog, announced that a software development kit (SDK) would be made available to third-party developers in February 2008. The iPhone SDK was