When will Apple iPhone 6S be released?

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I think apple iPhone is best smart phone ever and I love it. Apple has published some information about their new iPhone 6S. it will come with ios 7 or higher. apple says iPhone 6s will come with clear interface, re-designed icons and functional layers. iPhone 6s responding to your movements and move functional layers. it gives 3D look. ios 7 gives some futures to arrange our photos, such as moments and collection. airdrop makes it easy to share our files with fiends. now apple siri works better with both male and female voices. I don't know about the screen resolution, camera, processor, ram and battery. but those all will be better than iPhone 5s. If you know more about iPhone 6S, please come and let's discuss. And the main question of iPhone lovers, "when will iPhone 6S come?"