Here is a selection of Iphone sim only contract deals. The below sim only contracts are specificallt for Iphones only, and if your looking for a sim only deal for an Iphone this is the place to compare the best deals. Please note, due to the nature of how the iphone works, normal internet sim cards will not work on iphones. The below sim only deals all work on Iphone handsets. A sim only contract is whereby you decide that you dont need a new phone because your current phone does its job perfectly. With a sim only contract you dont get a mobile phone and instead you get just the sim card which saves you a lot of money as well as giving you lots of extras.