Last month Apple announced a new iPad and a new iPhone. While the iPhone was new, it was also familiar in many ways because it was direct successor to Apples iPhone 5s which had been on the market for two and a half years. According to Apple, they sold thirty million 4-inch iPhones in 2015. Thirty million smartphone sales is a figure that many companies would be happy with for their flagship smartphone, but in Apples case its really interesting because that aging iPhone 5s was the only 4-inch iPhone they were selling. Being able to sell thirty million two-year-old smartphones is a pretty good indicator that theres a market for a smaller iPhone, and with the iPhone 5s approaching the end of its lifetime it was time to replace it. Read on for the full review of the iPhone SE to see what changes Apple has brought to the 4-inch form factor.