IPhone
When you’re deciding which iPhone to buy from the new lineup, your decision will be driven primarily by what size screen you want. The iPhone 5c (sadly relegated to one capacity, 8GB) and 5s have a 4-inch screens, while the 6 and 6 Plus have 4.7 and 5.5-inch respectively; think about how they fit into your life – literally. There are other differences; the 6 Plus’s camera has an image-stabilising lens, and both 6 models are faster.
The iPhone 4s has sadly been retired by Apple but there are still some available from carriers (and secondhand, of course), so if you want that 3.5-inch, thumb-friendly design, you can still get it. The iPhone 4s will run iOS 8, but don’t be surprised if it won’t be upgradable to iOS 9 (out in October).