I've only had two iPhones in my life, but I would have to say that my favorite iPhone would have to be the 4. The reason being that it was the most durable phone that I've had. Yes, I had to replace the back multiple times because I would keep dropping my phone, but my phone didn't start slowing down after that. I now have the 5c and while it's a good phone, it's not my favorite. I like the new updates and the fact that I have Siri now, but the 4 will always be my favorite. So, what's your favorite iPhone and why?