Until some months ago, I had a factory unlocked iPhone 5 which I used for 2+ years. I had no reason to switch to a more recent model, other than the (at times) nagging need for the finger-print lock. Then, out of the blue, the battery on my iPhone began to malfunction, in that, it would only let the phone stay on for a couple of minutes unless it was plugged constantly to a power source.<p>I bought an iPhone 6S, space gray, factory unlocked at around $650 (excluding tax). I sent my iPhone 5 back to Apple for a recycle. They gave me $200 in iTunes gift money. So, all in all, I got a new iPhone 6S for $450 (excluding tax).