The Guardian has published an guide to UK iPhone 4S mobile tariffs, concluding that some two-year contract deals are cheaper than buying the new iPhone outright on a SIM-only contract.
"The entire phone contract field is a thicket," wrote Guardian journalist Charles Arthur. The conclusion that two-year contracts are better than SIM-only deals was also made with the cheapest SIM-only provider, GiffGaff.
"From our calculations, the best deals generally come from Three. The most expensive ones - generally (but not always) - are with Vodafone," said the Guardian.

http://www.mcvuk.com/news/read/a-24-...u-money/086138