Im due an upgrade in a weeks time. Im quite happy with the phone ive got. I only use it for texs and making calls. Im thinking of selling my upgrade. How do I get an idea of the phone values of the handsets they offer me. I know the phone sites that you can sell the handset too but they dont give you a true value do they? Im with Orange and they usualll dont offer me a very good handset as i get free home broadband.