If you take out a second contract on Three, you can have a iPhone 3GS. 500 mins, 5000 3-3calls, 5000 texts and 1GB internet.£25/ month. Internet Texter 500, cost this much with any phone.
Call 0800 358 4397 and quote DIS08.
one advantage of Three is that they let you cap your account so you never have to spend more than the £25 contract by mistake or if someone "borrows' or steals your phone.