Smartphones like the iPhone 6S are a type of device .
The iPhone 6S and iPhone 6S Plus ( stylized as iPhone 6s and iPhone 6s Plus ) are smartphones designed , developed and marketed by Apple Inc . The devices were announced on September 9 , 2015 , at the Bill Graham Civic Auditorium in San Francisco by Apple Inc. CEO Tim Cook , and went on sale on September 25 , 2015 .
IPhone 6S