IPhone 6S

The iPhone 6 S  and iPhone 6 S Plus are smartphones designed by Apple Inc. The devices are part of the iPhone series and were announced on September 9, 2015. The iPhone 6 S and iPhone 6 S Plus jointly serve as successors to the iPhone 6 and iPhone 6 Plus of 2014, and predecceesors to the iPhone 7/7 Plus of 2016. It is the oldest iPhone left in support.

Features
The iPhone 6 S is an evolution over its predecessor, featuring improved hardware specifications, including 3D Touch, a force-sensitive touchscreen; upgraded rear-facing and front-facing cameras; a faster Apple A9 processor; a new chassis made of a stronger alloy of aluminum; second-generation Touch ID; improved LTE and Wi-Fi connectivity; and a new rose gold finish in addition to the space gray, silver, and gold finishes found on the previous models, while maintaining an identical design. The devices shipped with iOS 9 pre-installed at launch. The device came in 4 colors--silver, gold, space grey and rose gold.

Release
As of September 28, 2015, 13 million iPhone 6 S and 6 S Plus models have been sold, setting a new first-weekend sales record, up from the 10 million that iPhone 6 and iPhone 6 Plus units had sold the previous year. It was discontinued on September 12, 2018 when Apple released the iPhone X R, iPhone X S , and iPhone X S  Max.