We don't sell this phone any more.
check out the iPhone 7.
O2 Refresh is a different type of contract that splits your Pay Monthly bill into two parts. The Device Plan is the cost of your phone or tablet, and Airtime Plan is the cost of your data, texts and minutes. Once you've paid off your device, it's yours. And your bill automatically halves. You can pocket the cash, or put the money you save towards a new wearable or some extra data.