Vodafone has officially announced their pricing plans for the iPhone when they begin to start selling the device on 14 January. The operator is selling through variants of the phone, the iPhone 3G 8GB, the iPhone 3GS 16GB and the iPhone 3GS 32GB. All three versions are available for free on selected contracts. Customers can pre-order the phone from today in-store, through their account manager or online at vodafone.co.uk/iphone. Anyone that does so will be rewarded with free Vodafone to Vodafone phone calls for the duration of their contract. Vodafone will begin selling the iPhone exactly a month after Tesco Mobile who began rolling out the device last week. O2 had previously had exclusivity on the iPhone, but that is no longer the case with Orange also already selling the handset. For a full review on the Apple iPhone 3GS click here.