Fee of monthly contract x remaining months with most networks.
Example
£35 x 8 months = £ 280 ( trade In your handset to make up this fee )
But
I usually upgrade or pay off to the cancelation date
Why?
Example
18 month contract
If you upgrade on 16 month which case with the 2 months remaining add on to the next upgrade contact you take meaning its really a 20 month contract.
IF ANYONE READING THIS AND ARE ON ORANGE UK AND UNDER +24 RING THEM UP TO GET THE STUDENT TARIFF FOR THE SAME PRICE YOU ARE PAYING 2000 mins + UNLIMITED TXTS + 2GB DATA

have a great day