<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> iPhone 6S and iPhone 6S Plus (stylized and marketed as iPhone 6s and iPhone 6s Plus) are smartphones designed, developed and marketed by Apple Inc . They were announced on September 9, 2015, at the Bill Graham Civic Auditorium in San Francisco by Apple CEO Tim Cook, with pre-orders beginning September 12 and official release on September 25, 2015 . The iPhone 6S and 6S Plus were succeeded by the iPhone 7 and iPhone 7 Plus in September 2016 . </P> <P> The iPhone 6S has a similar design to the iPhone 6 but includes updated hardware, including a strengthened chassis and upgraded system - on - chip, a 12 - megapixel camera, improved fingerprint recognition sensor, and LTE Advanced support . The iPhone 6S also introduces a new hardware feature known as "3D Touch", which enables pressure - sensitive touch inputs . </P>

When did the apple iphone 6s plus come out