What is the specs of the iPhone 6s/7 and when it will be released on 2015?

Hi. I'm going to preorder an iphone 6s/7 in 2015. But i want to know the specs from rumors and release date. Please tell me.

Thank you

Way to early to speculate especially if that's what you wanna invest in I'd say wait for the official trailer or apple news till its release hard to tell what path their taking with their recent releases is like asking what's the next iphone 8 or 9 or 10 who knows common sense will tell somebody hopefully it will be better in the future.

How are we to know? Not even Apple would know at this point.