Its probably testing for the iPhone 8 in 2018. The iPhone 7s is already slated for 2017 most likely.Surely those are not the next iPhone unless this is old info and the report should be "tested." It's 10 months to the next iPhone launch. Seem prototype test phases should have ended a while ago and Apple would be testing and tweaking the chosen design and getting ready to place part orders and fabricating the die tools to make it very soon.