As far as specification is concern, there is not much news about it however since very new iPhone (except S’s and C’s versions) are launched with latest iOS. So Apple IPhone 7 will going to feature new OS i.e. iOS 10 which possibly be announced latest by September 2016.
If we talk about the screen size, the device is going to feature a little bigger screen than its predecessors i.e. iPhone 6 and 6 Plus which measure screen size of 4.7 and 5.5 respectively. Therefore the new iPhone will probably feature 5.8 screen size with OLED display. As far as camera is concern, iPhone 7 will sport improved 13 megapixel primary iSight camera with 8 megapixel secondary one.
Apple Iphone 7 Full Specification, Features, Price and Release Date