Its always fun to play devils advocate.....

http://www.techradar.com/us/news/phone-and-communications/mobile-phones/10-things-we-d-like-to-see-in-the-iphone-6s-and-iphone-7-1269122

According to a leaked Vodafone email the iPhone 6S will be arriving in September, which comes as no surprise at all, given that September is when new models typically launch. However it gets a bit more specific with a date of September 25.

On the other hand an earlier report pegs the iPhone 6S / iPhone 7 as launching in August. Apparently the change (if true) is due to an excessive component yield. KGI Securities analyst Ming-Chi Kuo - who has a track record that's better-than-average but not perfect - thinks an August announcement is likely as well. We're not convinced though.

According to GSM Dome Apple has started ordering camera sensors from Sony for the iPhone 6C, which follows news that Samsung is reportedly already producing the A9 processor that is expected to be included in the iPhone 6S, so all of the iPhone 6S/7 models could be ahead of schedule.

But while an August launch would be nice September 2015 is still our best guess for the iPhone 6S, as previous models have launched in that same month.