You can get 600 mins with the £35 a month contract. Lets say you go on the £35 24 month contract. You have to pay £89 for the phone so thats: 35*24+89 = £929 In your case, over 2 years you'd be paying: 20*24+450 = £930 Assuming you're going to use the phone for at least 2 years (£450 is a lot of money for something you're going to use for less than that), I don't see how that's a great deal...