trade in value

The simplest way is to start the new iPhone ordering process. At the very beginning, it will ask you if you want to trade in a phone. At that point, you will be asked a few simple questions as to the phone's condition. It pays to be honest here. Regardless, after answering these questions, you will get an initial trade-in value. You can decide then, whether or not, it is worth it.

If you want to calculate your phone’s trade-in value, use the website: Apple Trade In - Apple (UK)