Ok I am a bit confused. If the deals have a 30£ range for different networks why would you notjust buy the phone on the cheapest network and use your own sim from the more expensive network if you haveone already. Even with a £10 top up you would still be ahead £20 if you were with the most expensive network and bought the phone from the cheapest network.
Am I missing something? Would really like to know if my thinking is correct. I have an o2 sim with a web bolt on.
Thanks for any replies