As it is a firm fact that Apple Inc will be launching new smartphones on the mid-September this year, there are several rumors suggests that the new iPhone will not be named as iPhone 7, instead it is named as iPhone 6SE. A recent new stated that the 2016 iPhone will be launched on the 12th September this year while will be officially available on 16th September onwards.
If what @evleaks stated are correct, the Apple launch date could be set on the 5th or 6th September this year while the pre-orders starts from 9th Sept. With Apple decision to lengthen their product launch interval, the new iPhone could be named as iPhone 6SE instead of iPhone 7.
Source : Sogi