T-Mobile has this iPhone 4 micro-SIM for a fiver, and each time you top up with £10 you get 100 free minutes to use the following month. But the best part is the 12 months of free internet, worth £40.
You’ll have to throw £10 of credit in your basket, so that’s £15 delivered. T-Mobile notes: "the 12 months free internet is for the iPhone 4 only and is not available for the iPad or any other device."
T-Mobile’s Fair Use Plan for data is 500MB per month for streaming videos and uploading/downloading files, with unlimited browsing and email.
(Thanks to thebobster at HUKD)