While the others would follow suit very quickly, EE have come forward with their iPhone 5S costs. They are not cheap, and the prices on 4G range from £259.99 up front on £26/month contract, to £19 up front on £51/month. All of these offer unlimited calls and texts, the only difference being the amount of data you get.
The numbers obviously only go higher if you look at the 32GB iPhone or the 64GB version.
3G costs are a bit cheaper, but I wouldn’t really call that value for money. The numbers are below for your perusal, and more details are available at the following link: