I have an unlocked iphone and am on a vodaphone contract which runs out next month. I am looking at another provider who gives 500mins talk, 100 texts and 20mb of download. I do not need a phone as i intend to keep the glorious iphone.

How cheap can this be done, do i have bargaining power as I don't need a phone?

Should I get freebies instead of a phobe (PS3 etc...)?

Help as this is all very confusing.