We did a lot of sums last year, when the 5S came out.
The best value, by a long way, was to buy your iPhone full price from apple (regardless of spec) and then get a sim-only contract... with giff gaff or tesco, if their package suits you, or a sim-only with ee, vodka or O2, if they suit you better.
So far, I think this year is the same. When you can get a 4GB 4G contract on a sim-only for a tenner, on a monthly contract, then it's a no-brainier to get the phone outright from apple, and keep your options open for next year, as well as saving a load of cash.
The best value, by a long way, was to buy your iPhone full price from apple (regardless of spec) and then get a sim-only contract... with giff gaff or tesco, if their package suits you, or a sim-only with ee, vodka or O2, if they suit you better.
So far, I think this year is the same. When you can get a 4GB 4G contract on a sim-only for a tenner, on a monthly contract, then it's a no-brainier to get the phone outright from apple, and keep your options open for next year, as well as saving a load of cash.