Mobile phones

My contract is up with T-mobile next month - am toying with changing to o2 so I can get an Iphone - anyone got one - are they worth it - is o2 better than it used to be signal wise?
matty wrote:My contract is up with T-mobile next month - am toying with changing to o2 so I can get an Iphone - anyone got one - are they worth it - is o2 better than it used to be signal wise?