I just bought an iPhone SE. Was a little surprised that the default software it came with is 10.1.1. I was expecting and hoping it to come with 9.3 as from prior experience, iPhones run most seamlessly on their native iOS. When I got the iPhone 5 in December 2013, it came with its native iOS 6 despite 7 already being available. Why don't all iPhones come with their native iOS out of the box?