I believe that upgrades should b introduced more frequently, without contract renewal on a 6 month basis in place of the 24 month duration of the contract contracts will continue along the 24 months but six months payment should contribute to a new upgrade, because after some time the owner may become unhappy with phone performance and may wish to get a new phone, or replacement, perhaps with an extra charge of say £30 to £60 pound depending on the phone. But no more than £100 because from a 6 month payment that would b seen or perceived as excessive. remember we are in recession, not everybody has money to spare, appeal to ur public