the thing is with cashback deals it seems to good to be true , my advice having worked in the mobile phone industry for 15 years is stay clear of cashback deals to much hassle and you dont get the true benefits of a tariff my advice would be deal with network branded stores only these will give you the best tariff the best deal and piece of mind, avid the independants browse the networks, ie Orange O2 T-mobile they offer much better vaue, if you go for a cashback deal they will get their money back with the bill! think of the usage of the phone not your pocket! there is so much value going direct to the network shops on the high street, another tip would be to go to your current network you will be amazed in what they will throw at you to upgrage you to keep you! remeber they dont want to lose you!